J.M.J.
Thomas,
I’ve heard a couple interesting things. The first is that this took place on the feast of booths, which had something to do with erecting tents, and so… I don’t know, St. Peter had tents on the brain or something.
But I heard an excellent homily on this story recently, and the pastor pointed out a really excellent meaning behind the text. It was that, as fallen men, we desire to settle down, to have a routine, to be comfortable, and this extends even to worship. We like to have our nice Sunday morning worship, or pray the Rosary on Wednesdays, or what have you, and
just keep it that way. We resist change. But! The whole purpose of the worship of God is to get up, move, and be on our way towards holiness and towards God, which can be uncomfortable sometimes.
So, St. Peter here is acting as the voice for our slothful selves, but Our Lord ignores the comment, because one big reason He took Peter, James, and John with him was to give them strength enough to bear with the suffering of the days ahead, or at least to turn back to Him afterward.
I found that explanation helpful, anyway. God bless!