A friend cannot be considered a friend unless he is tested on three occasions: in time of need, behind your back, and after your death.
He who has a thousand friends has not a friend to spare, while he who has one enemy will meet him everywhere.
There is no capital more useful than intellect and wisdom, and there is no indigence more injurious than ignorance and unawareness.
There is no knowledge and science like pondering and thought; and there is no prosperity and advancement like knowledge and science.
There are so many highly esteemed ones who became miserable and humiliated just because of their bad temper and morals; and humble people who have attained eminence and the highest honors because of good temper and morals.
When wisdom reaches the acme of perfection, it will suppress the vicious instincts and injurious desires.