我已经注意到有爬山习惯的年轻人长大后通常有所作为。
河流不抗拒石头,它绕过它们,教会我们适应性的智慧。
Conflict is the gadfly of thought. It stirs us to observation and memory. It instigates to invention. It shocks us out of sheeplike passivity, and sets us at noting and contriving.