John 1:12 But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name: 13 Which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.
If you have been truly born again you have a new and holy nature, and you are no longer moved towards sinful objects as you were before. The things that you once loved you now hate, and therefore you will not run after them. You can hardly understand it but so it is, that your thoughts and tastes are radically changed. You long for that very holiness which once it was irksome to hear of; and you loathe those vain pursuits which were once your delights. The man who puts his trust in the Lord sees the pleasures of sin in a new light. For he sees the evil which follows them by noting the agonies which they brought upon our Lord when He bore our sins in His own body on the tree. Without faith a man says to himself, “This sin is a very pleasant thing, why should I not enjoy it? Surely I may eat this fruit, which looks so charming and is so much to be desired.” The flesh sees honey in the drink, but faith at once perceives that there is poison in the cup. Faith spies the snake in the grass and gives warning of it. Faith remembers death, judgment, the great reward, the just punishment and that dread word, eternity.
John 3:3 Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God. 4 Nicodemus saith unto him, How can a man be born when he is old? can he enter the second time into his mother’s womb, and be born? 5 Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. 6 That which is born of the flesh is flesh; and that which is born of the Spirit is spirit. 7 Marvel not that I said unto thee, Ye must be born again. 8 The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth: so is every one that is born of the Spirit.