It is a pity that, as one gradually gains experience, one loses one's youth.

There are so many mistakes you can learn only by making them yourself. There is no substitute for experience.

I think the one lesson I have learned is that there is no substitute for paying attention.

Some lessons have to be experienced to be learned.

We learn from experience that men never learn anything from experience.

He who learns must suffer.

Young men most needed experience. They could not play well if they trusted to a general rule. Every card had a relative value. Principles had better be left aside; values were enough.

The harshest lesson of all was that which ran contrary to the teaching of his own personality.

You have learned the lesson by experience.

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

Experience is a brutal teacher, but you learn fast.

You just had to apply judgment to your action, and such judgment came with experience — but experience often came from bad decisions.

Suffering brings experience.

Learning's always a painful process.