As in our lives so also in our studies, it is most becoming and most wise, so to temper gravity with cheerfulness, that the former may not imbue our minds with melancholy, nor the latter degenerate into licentiousness.
Pliny the ElderThe most disgraceful cause of the scarcity [of remedies] is that even those who know them do not want to point them out, as if they were going to lose what they pass on to others.
Pliny the ElderLet not things, because they are common, enjoy for that the less share of our consideration.
Pliny the Elder