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 ElderI think it is the most beautiful and humane thing in the world, so to mingle gravity with pleasure that the one may not sink into melancholy, nor the other rise up into wantonness.
Pliny the ElderAs land is improved by sowing it with various seeds, so is the mind by exercising it with different studies.
Pliny the Elder