Experience is not the best teacher - evaluated experience is the best teacher!
No matter how smart we are, our understanding will never catch up with our experience.
The truth is that experience is costly but not learning from experience is more costly.
Experience isn't what happens to you, as much as what you do with what happens to you.
When 25 years have gone by have you gained 25 years experience, or gained one year of experience 25 times?
Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so.
Never argue with an idiot. They drag you down to their level then beat you with experience.