'...when Christ's thoughts were full of his glory, and when he took in consideration of it unto the utmost, even then, and upon that occasion, and in the midst of those thoughts, he washed his disciples' feet. And what was Christ's meaning in this, but that, whereas when he should be in heaven, he could not make such outward visible demonstartions of his heart, by doing such mean services for them; therefore by doing this in the midst of such thoughts of his glory, he would show what he could be content (as it were) to do for them, when he should be in full possession of it? So great is his love unto them.'
Thomas Goodwin, The Heart of Christ, p.9.