#2 is one that makes me think, first I agreed completely, because I know I change all the time, nobody remains the same, but then I realize that the unchanged place has also changed, because nothing remains the same - and then I realized that maybe it's my perceptions that have changed, that there is the possibility I am only standing in a different place, looking at a different view

Good ones for any day.

No.1 is something many people are afraid off and we get that "it was good enought for my parents and me, so it should be good enough for you" approach to education.

#3, good old Groucho, right on.