The known is finite, the unknown infinite; intellectually we stand on an islet in the midst of an illimitable ocean of inexplicability.  
The more you do, the more you learn. The more you learn, the more you can do.
对于手中紧急待办的事情,千万不要急躁,而应沉下心,详慎周密地思考斟酌,对于已经考虑成熟的问题,千万不要延缓,而应横下心,果决神速地实施解决。