The longer we dwell on our misfortunes, the greater is their power to harm us.

I know that I am intelligent, because I know that I know nothing.

Many are they who have a taste and love for drawing, but no talent; and this will be discernible in boys who are not diligent and never finish their drawings with shading.

Man, alone, has the power to transform his thoughts into physical reality; man, alone, can dream and make his dreams come true.

Man is the only creature that refuses to be what he is.