Vice has more martyrs than virtue; and it often happens that men suffer more to be lost than to be saved.

The firmest of friendships have been formed in mutual adversity, as iron is most strongly united by the fiercest flame.

A coxcomb begins by determining that his own profession is the first; and he finishes by deciding that he is the first of profession.

Those who visit foreign nations, but who associate only with their own countrymen, change their climate, but not their customs 'caelum non animum mutant': they see new meridians, but the same men, and with heads as empty as their pockets.

Courage is generosity of the highest order, for the brave are prodigal of the most precious things.

The interests of society often render it expedient not to utter the whole truth, the interests of science never: for in this field we have much more to fear from the deficiency of truth than from its abundance.

Wealth is a relative thing since those who have little and want less are richer than those who have much but want more.