It takes a lot of time to grind bricks into mirrors, but it takes a lot of time to grind and drop water to wear through stones

Iron rods are ground into needles

The pyramid is made of stones piled up one by one. (English) Shakespeare)

When Heaven is about to entrust this man with a great responsibility, he must first strain his mind, strain his muscles and bones, starve his body and skin, deplete his body, and mess up his actions, so if he is tempted to endure, he has It helps what it can't.

How can you get the fragrance of plum blossoms without a cold that cuts to your bones?