Text :2 Peter 1:3-4 " According as his divine power hath given unto us all things that pertain to life and godliness through the knowledge of him that hath called us to glory and virtue:(vs4)Whereby are given unto us exceeding great and precious promises: that by these ye might be the partakers of the divine nature having escaped the corruption that is in the world through lust".
2 Cor.6:14;16-18 & Chap. 7:1: "Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness ? and what communion hath light with darkness?(vs16) And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them; and I will be their God, and they shall be my people.(vs17)Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you, (vs18) And will be a Father unto you, and ye shall be my sons and daughters, saith the Lord Almighty".Chapter7:1 "Having therefore these promises dearly beloved, let us cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God".
Promise means "words said or written binding a person to do or not to do something.(2) indication of future excellence; something that gives hope of success or ground of expectation for".
The Pulpit Commentary, Vol. 19, pages184-185, a commentary on 2 Cor.7:1 "THE PROMISES OF GOD AN INCENTIVE TO HOLY LIVING. Divine promise is found in all parts of the Scripture. The crown of revelation is thickly studded with the pearls of promise. God encourages his people by multiplying promises to them. There are promises suited to every condition--- for joy, sorrow, sickness, health, penury(great poverty), prosperity, weakness, strength. We change greatly in experience, but in every new condition we find a promise appropriate to it. The manna of promise covers the path of pilgrimage. How needful are the promises to us? For our support, guidance, comfort, encouragement,, happiness, advance. God's promises are our rods and staffs. Were it not for such up holdings, we should soon sink in the mire. How precious are they? What promises are like unto these? How can we compute the value of that which is invaluable? Divine promises are things by themselves. Nothing could compensate for their loss. Of such value are they that only God is rich enough to bestow them. What reliance maybe placed on them? They are all "yea" and "amen" in Christ. Promises, indeed, are obtained from men, but what men fail in is fulfillment. But the word of Jehovah cannot be broken. His promises are precious, but they are not more precious than sure.