John 8:27-29

27 They did not perceive (know, understand) that He was speaking to them about the Father.

28 So Jesus added, When you have lifted up the Son of Man [on the cross], you will realize (know, understand) that I am He [for Whom you look] and that I do nothing of Myself (of My own accord or on My own authority), but I say [exactly] what My Father has taught Me.

29 And He Who sent Me is ever with Me; My Father has not left Me alone, for I always do what pleases Him.