译文：纵欲放荡、消极怠慢就不能勉励心志使精神振作，冒险草率、急躁不安就不能修养性情。赏析：我们要是一直沉迷于物质享受，贪图享乐，做任何事就会消极懈怠。做事草率鲁莽，浮浮躁躁的，事情也会难以成功。
The function of mental processes is to mediate between the needs of the organism and the demands of the environment.
The most rewarding part of science is seeing your work help others.