Natural abilities are like natural plants, that need pruning by study and studies themselves do give forth directions too much at large, except they be bounded in by experience.

No man's knowledge here can go beyond his experience.

To reach something good it is very useful to have gone astray, and thus acquire experience.

A conception not reducible to the small change of daily experience is like a currency not exchangeable for articles of consumption it is not a symbol, but a fraud.

The reward of suffering is experience.