“Now it shall come to pass, if you diligently obey the voice of the Lord your God, to observe carefully all His commandments which I command you today, that the Lord your God will set you high above all nations of the earth. And all these blessings shall come upon you and overtake you, because you obey the voice of the Lord your God: “Blessed shall you be in the city, and blessed shall you be  in the country. “Blessed shall  be  the fruit of your body, the produce of your ground and the increase of your herds, the increase of your cattle and the offspring of your flocks. “Blessed shall  be your basket and your kneading bowl. “Blessed shall you be when you come in, and blessed shall you be when you go out. “The Lord  will cause your enemies who rise against you to be defeated before your face; they shall come out against you one way and flee before you seven ways. “The Lord will command the blessing on you in your storehouses and in all to which you set your hand, and He will bless you in the land which the Lord your God is giving you. “The Lord will establish you as a holy people to Himself, just as He has sworn to you, if you keep the commandments of the Lord your God and walk in His ways. Then all peoples of the earth shall see that you are called by the name of the Lord , and they shall be afraid of you. And the Lord will grant you plenty of goods, in the fruit of your body, in the increase of your livestock, and in the produce of your ground, in the land of which the Lord swore to your fathers to give you. The Lord will open to you His good treasure, the heavens, to give the rain to your land in its season, and to bless all the work of your hand. You shall lend to many nations, but you shall not borrow. And the Lord will make you the head and not the tail; you shall be above only, and not be beneath, if you heed the commandments of the Lord your God, which I command you today, and are careful to observe them.  So you shall not turn aside from any of the words which I command you this day, to the right or the left, to go after other gods to serve them. “But it shall come to pass, if you do not obey the voice of the Lord your God, to observe carefully all His commandments and His statutes which I command you today, that all these curses will come upon you and overtake you: “Cursed shall you be in the city, and cursed shall you be in the country. “Cursed shall  be your basket and your kneading bowl. “Cursed shall  be the fruit of your body and the produce of your land, the increase of your cattle and the offspring of your flocks. “Cursed shall you be when you come in, and cursed shall you be when you go out. “The Lord will send on you cursing, confusion, and rebuke in all that you set your hand to do, until you are destroyed and until you perish quickly, because of the wickedness of your doings in which you have forsaken Me. The Lord will make the plague cling to you until He has consumed you from the land which you are going to possess. The Lord will strike you with consumption, with fever, with inflammation, with severe burning fever, with the sword, with scorching, and with mildew; they shall pursue you until you perish. “The Lord will cause you to be defeated before your enemies; you shall go out one way against them and flee seven ways before them; and you shall become troublesome to all the kingdoms of the earth”, (Deuteronomy 28:1‭-‬22‭, ‬25).
“Only be strong and very courageous, that you may observe to do according to all the law which Moses My servant commanded you; do not turn from it to the right hand or to the left, that you may prosper wherever you go. This Book of the Law shall not depart from your mouth, but you shall meditate in it day and night, that you may observe to do according to all that is written in it. For then you will make your way prosperous, and then you will have good success. Have I not commanded you? Be strong and of good courage; do not be afraid, nor be dismayed, for the Lord your God is with you wherever you go.”(Joshua 1:7‭-‬9)

Salt and light are ingredients,  and instruments  of change,and we are considered  as such . 

Then Jesus spoke to them again, saying, “I am the light of the world. He who follows Me shall not walk in darkness, but have the light of life.”(John 8:12).

“You are the salt of the earth; but if the salt loses its flavor, how shall it be seasoned? It is then good for nothing but to be thrown out and trampled underfoot by men. “You are the light of the world. A city that is set on a hill cannot be hidden.  Nor do they light a lamp and put it under a basket, but on a lampstand, and it gives light to all who are in the house.  Let your light so shine before men, that they may see your good works and glorify your Father in heaven”, (Matthew 5:13‭-‬16).

“But you, brethren, are not in darkness, so that this Day should overtake you as a thief. You are all sons of light and sons of the day. We are not of the night nor of darkness. Therefore let us not sleep, as others do, but let us watch and be sober. For those who sleep, sleep at night, and those who get drunk are drunk at night. But let us who are of the day be sober, putting on the breastplate of faith and love, and as a helmet the hope of salvation. For God did not appoint us to wrath, but to obtain salvation through our Lord Jesus Christ, who died for us, that whether we wake or sleep, we should live together with Him. Therefore comfort each other and edify one another, just as you also are doing”, (1 Thessalonians 5:4‭-‬11)
“Therefore, my beloved, as you have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling; for it is God who works in you both to will and to do for His good pleasure. Do all things without complaining and disputing, that you may become blameless and harmless, children of God without fault in the midst of a crooked and perverse generation, among whom you shine as lights in the world”,(Philippians 2:12‭-‬15).

“But the path of the just is like the shining sun, That shines ever brighter unto the perfect day. The way of the wicked is like darkness; They do not know what makes them stumble. My son, give attention to my words; Incline your ear to my sayings. Do not let them depart from your eyes; Keep them in the midst of your heart; For they are life to those who find them, And health to all their flesh. Keep your heart with all diligence, For out of it spring the issues of life. Put away from you a deceitful mouth, And put perverse lips far from you. Let your eyes look straight ahead, And your eyelids look right before you. Ponder the path of your feet, And let all your ways be established. Do not turn to the right or the left; Remove your foot from evil”, (Proverbs 4:18‭-‬27).

“Commit your way to the Lord , Trust also in Him, And He shall bring it to pass. He shall bring forth your righteousness as the light, And your justice as the noonday”.[Psalms 37:5‭-‬6]

“Oh, how I love Your law! It is my meditation all the day. You, through Your commandments, make me wiser than my enemies; For they are ever with me. I have more understanding than all my teachers, For Your testimonies are my meditation. I understand more than the ancients, Because I keep Your precepts. I have restrained my feet from every evil way, That I may keep Your word. How sweet are Your words to my taste, Sweeter than honey to my mouth! Through Your precepts I get understanding; Therefore I hate every false way. Your word is a lamp to my feet And a light to my path. The entrance of Your words gives light; It gives understanding to the simple. I opened my mouth and panted, For I longed for Your commandments. Look upon me and be merciful to me, As Your custom is toward those who love Your name. Direct my steps by Your word, And let no iniquity have dominion over me. Redeem me from the oppression of man, That I may keep Your precepts. Make Your face shine upon Your servant, And teach me Your statutes. Rivers of water run down from my eyes, Because men do not keep Your law. Righteous are You, O Lord , And upright are Your judgments. Your testimonies, which You have commanded, Are righteous and very faithful. My zeal has consumed me, Because my enemies have forgotten Your words. Your word is very pure; Therefore Your servant loves it”, (Psalms 119:97‭-‬101‭, ‬103‭-‬105‭, ‬130‭-‬140)

“For the commandment is a lamp, And the law a light; Reproofs of instruction are the way of life,”(Proverbs 6:23).

“Yes, and all who desire to live godly in Christ Jesus will suffer persecution. But evil men and impostors will grow worse and worse, deceiving and being deceived. But you must continue in the things which you have learned and been assured of, knowing from whom you have learned them,  and that from childhood you have known the Holy Scriptures, which are able to make you wise for salvation through faith which is in Christ Jesus. All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness, that the man of God may be complete, thoroughly equipped for every good work”. [2 Timothy 3:12‭-‬17].

“Do not think that I came to destroy the Law or the Prophets. I did not come to destroy but to fulfill.  For assuredly, I say to you, till heaven and earth pass away, one jot or one tittle will by no means pass from the law till all is fulfilled.  Whoever therefore breaks one of the least of these commandments, and teaches men so, shall be called least in the kingdom of heaven; but whoever does and teaches them, he shall be called great in the kingdom of heaven.  For I say to you, that unless your righteousness exceeds the righteousness of the scribes and Pharisees, you will by no means enter the kingdom of heaven.Matthew 5:17‭-‬20]