天有多高,地有多厚,通过实践才能得知。荀子强调实际行动,而非“坐而论道”。在自强不息的行动中,才能获得真知,发掘自己未知的潜能。
你说的话有什么益处呢?如果没有益处还要说,就是白费口舌。 
The ideas I had about supernatural beings came to me the same way that my mathematical ideas did. So I took them seriously.