Ability needs pruning by study, study needs be bounded In by experience

 

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．
　　　Bacon ，Of Studies ，Essays
　　　天生的能力好像天然生成的植物，必须通过学习加以修整；然而学习本身如若不由实践去约束，必然方向纷杂而漫无目的。
　　　培根：《随笔·论学习》

Pruning： n.修枝, 剪枝, 修剪

give forth v.发出, 发表