君子之学,务求在己而已。毁誉荣辱之来,非独不以动其心,且资之以为切磋砥砺之地。
君子的学问,关键在于自身。外界的毁誉荣辱,不仅不会动摇其心志,反而会成为磨砺自己的机会。
To understand a program you must become both the machine and the program.