John Gill Commentary John 14:11

"Believe me that I am in the Father, and the Father in me: or else believe me for the very works` sake." — John 14:11 (ASV)

Believe me that I am in the Father, and the Father in me ,
&c.] Take my word for the truth of this; you may assure yourselves that nothing is more certain; but if you will not believe upon my saying so, either believe for the sake of the doctrines I have preached unto you, which are such as never any mere man spoke, and which have been delivered in such a manner, and with such authority, as never were by man.

Some copies read, by way of interrogation, and so the Ethiopic version; and the Vulgate Latin version reads, "believe ye not?"

or else believe me for the very work's sake :
meaning his miraculous works, such as raising the dead, cleansing the lepers, causing the deaf to hear, and giving sight to the blind; and which were such as none but a divine person could ever perform.