A man's errors are his portals of discovery.

A man's errors are his portals of discovery.

I fear those big words which make us so unhappy.

I fear those big words which make us so unhappy.

If you don't make mistakes, you're not working on hard enough problems. And that's a big mistake.

If you don't make mistakes, you're not working on hard enough problems. And that's a big mistake.

Making a different mistake every day is not only acceptable, it is the definition of progress.

Making a different mistake every day is not only acceptable, it is the definition of progress.

Experience is the name every one gives to their mistakes.

Experience is the name every one gives to their mistakes.

All men make mistakes, but only wise men learn from their mistakes.

All men make mistakes, but only wise men learn from their mistakes.

A man of genius makes no mistakes; his errors are volitional and are the portals of discovery.

A man of genius makes no mistakes; his errors are volitional and are the portals of discovery.

More people would learn from their mistakes if they weren't so busy denying them.

More people would learn from their mistakes if they weren't so busy denying them.

You cannot step into the same river twice.

You cannot step into the same river twice.