There is nothing more essential to getting a project off the ground than the underestimate.

Man will have replicated his own intelligence not when he teaches a computer to reason but when he teaches a computer to have a nagging feeling in its circuits.

Perhaps I have lived my life to excess, but know what — if I had it to do over again, I would overdo it again.

The hardest thing about reality is returning to it after an hour inside your child's mind.

There are secrets I will take to the grave and others I'd feel safer having cremated.

As a general guideline, never marry anyone that you can't picture helping you go to the bathroom.

To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word "boo."