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.   John 3:3

Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.   John 14:6

That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation. For the scripture saith, Whosoever believeth on him shall not be ashamed.   Romans 10:9-11

And that he died for all, that they which live should not henceforth live unto themselves, but unto him which died for them, and rose again.   2 Corinthians 5:15

Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me. Revelation 3:20