To be always fortunate, and to pass through life with a soul that has never known sorrow, is to be ignorant of one half of nature.

The path of precept is long, that of example short and effectual.

The mind is slow to unlearn what it learnt early.

The first step towards amendment is the recognition of error.

The arts are the servant; wisdom its master.

I do not distinguish by the eye, but by the mind, which is the proper judge.