Over the 37 years I have bee around, there have been some inspiring quotes that make me want to get up and contuinue with renewed vigor or just make you stop and consider. Here is a sampling. Feel free to add on some of yours in the comments below.
"DO or DO NOT. There is no TRY!" - Yoda
"Beware of the Dark Side" - Yoda
"No parent should have to bury their child." - Theoden King
"I haven't failed. I've just found 10,000 ways that won't work."
Thomas Edison (1846 - 1931):
"It wasn't raining when Noah built the ark."
Howard Ruff
"I find your lack of faith disturbing" -Darth Vader