"I try not to make the same mistakes today that I made yesterday"

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

"Tomorrow is the most important thing in life. Comes into us at midnight very clean. It's perfect when it arrives and it puts itself in our hands. It hopes we've learned something from yesterday"

"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"

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

"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"

"What you do today can improve all your tomorrows"

"What is not started today is never finished tomorrow"

"Each day is the scholar of yesterday"