I also have several.
"A society that tolerates shoddy workmanship from its plumbers because plumbing is a lowly occupation and that does not question its philosophers because philosphy is an exalted profession is in serious trouble. Neither its pipes nor its theories will hold water." -- Unknown; may not be exact.
"The spirit and the bride say, 'come!' Let all who hear say, 'Come!' Let all who desire it come forward; accept the gift of life-giving water." -- Revelation 22:17
"We shall travel the world over, encountering strange cultures and many customs different from our own. And at the end of our journey, we shall return to this place and know it for the first time." -- Attributed to Pogo; may not be exact wording.
"Gentlemen, let us not make changes. Let us only make improvements." -- Sir Henry Royce.
"No, I don't believe in miracles. I rely on them." -- Me.
"Houston, this is Apollo 13. We have a problem." -- James Lovell, Commander of Apollo 13.