He who is fixed to a star does not change his mind.

Poor is the pupil who does not surpass his master.

Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory.

Iron rusts from disuse; water loses its purity from stagnation... even so does inaction sap the vigor of the mind.

He who wishes to be rich in a day will be hanged in a year.

He turns not back who is bound to a star