The true knowledge of God only come through the One Who is ‘ in the bosom of the Father’ – from Jesus
The word “Father’s bosom” means very close to the Father’s heart, to be by the Father’s side or on the Father’s breast. That word was used in John to describe John leaning on Jesus: «Now there was leaning on Jesus’ bosom one of His disciples, whom Jesus loved» (John, 13:23).
So Jesus was close to Father’s heart, and that is why He was able to manifest God to us. The true knowledge of God only come through the One Who is ‘ in the bosom of the Father’ – from Jesus.