Old saying:
If you want to hear God laugh, just tell Him what you are going to do tomorrow.........................
Funny joke:
A man asks God how long a billion years is to him. God said, it is as a single minute.
Then the guy asks God how much a billion dollars is to him. God said, it is like a penny.
Then the man says to God, May I have a penny. God said, “Sure, give me a minute.”