God sent His only Son Jesus Christ – who is God – the word of God to save us because we could not do anything ourselves.

John 1 “In the beginning was the Word, and the Word was with God, and the Word was God. ² The same was in the beginning with God. ³ All things were made through him. Without him, nothing was made that has been made. ⁴ In him was life, and the life was the light of men. 

¹⁰ He was in the world, and the world was made through him, and the world didn’t recognize him. ¹¹ He came to his own, and those who were his own didn’t receive him. ¹² But as many as received him, to them he gave the right to become God’s children, to those who believe in his name: ¹³ who were born not of blood, nor of the will of the flesh, nor of the will of man, but of God. “

As human beings, we have children through the will of the flesh/decision of a husband and wife.

But to become saved, it is not our effort or plan but the will of God.

It was never man’s idea to be saved by grace through faith.

Adam’s will was to become like God by human effort – i.e, salvation by works.

This is why no man is righteous and all are sinners who want to justify themselves.

But we cannot do it. That is why ONLY God can do it.

John 3

³ Jesus answered him, “Most certainly, I tell you, unless one is born anew, he can’t see God’s Kingdom.” ⁴ Nicodemus said to him, “How can a man be born when he is old? Can he enter a second time into his mother’s womb, and be born?” ⁵ Jesus answered, “Most certainly I tell you, unless one is born of water and spirit, he can’t enter into God’s Kingdom. ⁶ That which is born of the flesh is flesh. That which is born of the Spirit is spirit. ⁷ Don’t marvel that I said to you, ‘You must be born anew.’ ⁸ The wind blows where it wants to, and you hear its sound, but don’t know where it comes from and where it is going. So is everyone who is born of the Spirit.”

Jesus was saying that salvation is not man’s effort but it is done by the Holy Spirit making us born-again. This happens when we believe in Jesus Christ as written below

John 3

¹⁴ As Moses lifted up the serpent in the wilderness, even so must the Son of Man be lifted up, ¹⁵ that whoever believes in him should not perish, but have eternal life. ¹⁶ For God so loved the world, that he gave his one and only Son, that whoever believes in him should not perish, but have eternal life. 

¹⁷ For God didn’t send his Son into the world to judge the world, but that the world should be saved through him. ¹⁸ He who believes in him is not judged. He who doesn’t believe has been judged already, because he has not believed in the name of the one and only Son of God.