What is the meaning of Acts 13:25?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

As John was completing his course, he said, ‘Who do you suppose I am? I am not that One. But He is coming after me whose sandals I am not worthy to untie.’

Berean Standard Bible (BSB)

As John was fulfilling his course, he said, ‘What do you suppose that I am? I am not he. But behold, one comes after me the sandals of whose feet I am not worthy to untie.’

World English Bible (WEB)

And{G1161} as{G5613} John{G2491} fulfilled{G4137}{(G5707)} his course{G1408}, he said{G3004}{(G5707)}, Whom{G5101} think ye{G5282}{(G5719)} that I{G3165} am{G1511}{(G5750)}? I{G1473} am{G1510}{(G5748)} not{G3756} he. But{G235}, behold{G2400}{(G5628)}, there cometh one{G2064}{(G5736)} after{G3326} me{G1691}, whose{G3739} shoes{G5266} of his feet{G4228} I am{G1510}{(G5748)} not{G3756} worthy{G514} to loose{G3089}{(G5658)}.

Strong's King James

(25) And as Yochanan was completing his mission, he kept saying, "Who do you suppose I am? I am not! Yet behold, One is coming after me who I am not worthy to untie the sandals of his feet."

The F.O.G*

[25] As John completed his mission, he declared, 'Who do you think I am? I'm not the Messiah you're expecting. No - He's coming after me, and I'm not even worthy to untie His sandals.'

The F.O.G Paraphrase

and as John was fulfilling the course, he said, Whom me do ye suppose to be? I am not he, but, lo, he doth come after me, of whom I am not worthy to loose the sandal of his feet.

Young's Literal Translation