It is not enough to have a good mind; the main thing is to use it well.
The greatest minds are capable of the greatest vices as well as of the greatest virtues.
The principal effect of the passions is that they incite and persuade the mind to will the events for which they prepared the body.
The greatest minds, as they are capable of the highest excellencies, are open likewise to the greatest aberrations
In order to improve the mind, we ought less to learn, than to contemplate
So blind is the curiosity by which mortals are possessed, that they often conduct their minds along unexplored routes, having no reason to hope for success, but merely being willing to risk the experiment of finding whether the truth they seek lies there.
I am indeed amazed when I consider how weak my mind is and how prone to error.
The reading of all good books is like a conversation with the finest minds of past centuries.