Seek virtue rather than riches. You may be sure to acquire the first; but cannot promise for the latter. No one can rob you of the first without your consent; you may be deprived of the latter a hundred ways. – James Burgh, The Dignity of Human Nature: Book III. Of Virtue, 1754
People who have no hold over their process of thinking are likely to be ruined by liberty of thought. If thought is immature, liberty of thought becomes a method of converting men into animals. – Muhammad Iqbal