Experience

"Good judgment comes from experience and experience comes from bad judgment."

- Fred Brooks

Personal Take:
Exactly. 

Experience

"Experience is simply the name we give our mistakes."

- Oscar Wilde 

Personal Take:
Very true.  Unfortunately, we all need to find our own experiences; they are not transferable, no matter how much we try to share them with others.

Experience

"Experience is one thing you can't get for nothing."

- Oscar Wilde