Some gems from my maternal grandmother who passed away at 102. I miss her every day.
"Do unto others as you would have them do unto you." (And she really did live by the Golden Rule)
"Procrastination is the thief of time."
"Never take away someone's hope. It might be all that they have left."
And my personal favorite: "Pass it on." When my mother divorced my alcoholic father, I was in the third grade and my brother was two years younger. Our older sister had moved out, our home was in foreclosure, my mother had no job, no money, and we had nowhere to turn. My grandmother took us all in, raised my brother and me while my mother worked, and was always there no matter what. She encouraged me to dream and I went on from a rural high school to one of the nation's best universities and then later to law school. When I told her much later in life how grateful I was for everything that she had done for us, her response was simply "Pass it on." I've never forgotten that answer or the example that she set.