释义:只要有志向,就一定能成功。  
司马牛问君子。孔子说:“君子不忧不惧。”问:“不忧不惧,就能叫做君子吗?”孔子说:“问心无愧,何来忧惧?”
The function of mental processes is to mediate between the needs of the organism and the demands of the environment.
"The immune system is like a double-edged sword; it can fight cancer but also needs to be controlled."