Jesus Christ is the only way to the Father. He is the doorway to the Kingdom of GOD.
John 14:16 Jesus answered
I am the way and the truth and the life. No one comes to the Father except through me.
He came to the earth and conferred his Fathers Kingdom to us as his Father conferred his Kingdom to Christ Jesus. He manifested the Kingdom of his Father whenever he went through miraculous signs and wonders that affected his surroundings. From the bible story about Nicodemus, we can see him inquiring about the Kingdom and the many miracles and wonders that Jesus was performing. Jesus answered him:
John 3:3 Jesus replied
Very truly I tell you, no one can see the kingdom of God unless they are born again.