He came as Messiah, the timing of when he declared himself so has no bearing on the quotes he gave about following him. We are his sheep, he is our Shepherd, we know his voice, we follow him, we are a part of his sheep fold. Who was the shepherd David spoke of, in his 23rd Pslam? None other than Christ himself!
We die so that He may live within us. Is that follow?
No, there is no us left to follow Him. We die and are transformed into His likeness.
That leaves nothing of us left to follow Him.
Please, we don't need to argue or disagree.