“I personally believe this: We have only today; yesterday's gone and tomorrow is uncertain. That's why they call it the present. And sobriety really is a gift... for those who are willing to receive it.”

“I believe that the only way that the human race is gonna survive is to start colonizing space and setting up colonies on the moon, and then space stations.”

“Yesterday is History, Tomorrow a Mistery. Today is a gift, that's why they call it the present.”

“Yesterday is history, tomorrow is a mystery, today is a gift of God, which is why we call it the present.”

“The clock is running. Make the most of today. Time waits for no man. Yesterday is history. Tomorrow is a mystery. Today is a gift. That's why it is called the present.”

“Tomorrow is a mystery. Today is a gift. That is why it is called the present.”

“Yesterday is gone. Tomorrow has not yet come. We have only today. Let us begin.”