My flesh and my heart fail;
But God is the strength of my heart and my portion forever.

There was a man of the Pharisees named Nicodemus, a ruler of the Jews.
This man came to Jesus by night and said to Him, “Rabbi, we know that You are a teacher come from God; for no one can do these signs that You do unless God is with him.”
Jesus answered and said to him, “Most assuredly, I say to you, unless one is born again, he cannot see the kingdom of God.”
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?”
Jesus answered, “Most assuredly, I say to you, unless one is born of water and the Spirit, he cannot enter the kingdom of God.
That which is born of the flesh is flesh, and that which is born of the Spirit is spirit.
Do not marvel that I said to you, ‘You must be born again.’”

I am the vine, you are the branches. He who abides in Me, and I in him, bears much fruit; for without Me you can do nothing.
If anyone does not abide in Me, he is cast out as a branch and is withered; and they gather them and throw them into the fire, and they are burned.
If you abide in Me, and My words abide in you, you will ask what you desire, and it shall be done for you.
By this My Father is glorified, that you bear much fruit; so you will be My disciples.
As the Father loved Me, I also have loved you; abide in My love.
If you keep My commandments, you will abide in My love, just as I have kept My Father’s commandments and abide in His love.