Practice makes perfect.
熟能生巧。
Experience keeps a dear school,but fools learn in no other.
经验学校学费高，愚人旁处学不到。
Experience without learning is better than learning without experience.
有经验而无学问，胜于有学问而无经验。
Wit once bought is worth twice taught.
由经验而得的智慧，胜于学习而得的智慧;一次亲身的体会，胜过两次的教师教导。
Seeing is believing.
百闻不如一见。