That good diffused may more abundant grow. [ Cowper ]

Good, the more communicated, more abundant grows. [ Milton, Paradise Lost ]

Youth is like those verdant forests tormented by winds: it agitates on every side the abundant gifts of nature, and some profound murmur always reigns in its foliage. [ M. de Guerin ]

The richest genius, like the most fertile soil, when uncultivated, shoots up into the rankest weeds; and instead of vines and olives for the pleasure and use of man, produces to its slothful owner the most abundant crop of poisons. [ Hume ]