"There are proofs that date back to the Greeks that are still valid today"

"The best preparation for good work tomorrow is to do good work today"

"In thinking about nanotechnology today, what's most important is understanding where it leads, what nanotechnology will look like after we reach the assembler breakthrough"

"Today I bent the truth to be kind, and I have no regret, for I am far surer of what is kind than I am of what is true"

"I like to use the hard times in the past to motivate me today"

"The science of today is the technology of tomorrow"

"The politician's promises of yesterday are the taxes of today"

"What is not started today is never finished tomorrow"

"Today you are you! That is truer than true! There is no one alive who is you-er than you!"

"An economist is an expert who will know tomorrow why the things he predicted yesterday didn't happen today"

"Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning"