To me, the Resurrection was proof of his final authority and authentic sonship.
Matthew 3:17 "This is my Son in whom I am well pleased"
John 1:12-13 says "12 But to all who did receive Him, to those who believed in His name, He gave the right to become children of God— 13 children born not of blood, nor of the desire or will of man, but born of God"
Note: "gave the right to become"
If someone is your Lord, you follow Him. You follow Him because you believe in Him.
John 3:35-36
35 The Father loves the Son and has placed all things in His hands. 36 Whoever believes in the Son has eternal life. Whoever rejects the Son will not see life. Instead, the wrath of God remains on him.”
And there are those too, whom the Son rejects
Matthew 7:21-23
21 “Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but the one who does the will of my Father who is in heaven. 22 On that day many will say to me, ‘Lord, Lord, did we not prophesy in your name, and cast out demons in your name, and do many mighty works in your name?’ 23 And then will I declare to them, ‘I never knew you; depart from me, you workers of lawlessness.’
They clearly thought He was their Lord, but I suspect they remained Lords of themselves.
There is a moment in the gospels:
John 15:15 I no longer call you servants, because a servant does not know his master’s business. Instead, I have called you friends, for everything that I learned from my Father I have made known to you.
I am forgiven for my sins before the Father for accepting His son, but to me a good measure of the Christian walk is "would Jesus call me friend?" To answer that question, I have to get to know Him, and then I have to follow Him. But I would also say, that following Him is a good way of getting to know Him. You can't have one without the other. You will have all the joys of the journey, the transformation and the becoming. Of seeking and doing the will of the Father. And you will never hear that terrible utterance at the end:
"I never knew ye"
