John 21:18-19

Girdedst thyself; he was at liberty to go and come at pleasure.

Stretch forth thy hands; in crucifixion.

Gird thee; bind thee for execution. The binding, though coming before crucifixion, is named after it.
Signifying; pointing out beforehand.

Follow me; in an emphatic sense, Follow me not only as my disciple, but in my crucifixion also. No ardency of devotion to the cause of Christ, and no degree of usefulness will secure his servants from great trials, or even from violent death; but no trials will come upon them except under the direction of God, and such as will best prepare them to glorify and enjoy him.
Copyright information for Family