NET
16 For we did not follow cleverly concocted fables when we made known to you the power and return of our Lord Jesus Christ; no, we were eyewitnesses of his grandeur.
Darby
16 For we have not made known to you the power and coming of our Lord Jesus Christ, following cleverly imagined fables, but having been eyewitnesses of *his* majesty.
KJV
16 For we have not followed cunningly devised fables, when we made known unto you the power and coming of our Lord Jesus Christ, but were eyewitnesses of his majesty.