夫君子之行，静以修身，俭以养德。非淡泊无以明志，非宁静无以致远。夫学须静也，才须学也；非学无以广才，非志无以成学。淫慢则不能励精，险躁则不能治性。

——诸葛亮

The conduct of a gentleman lies in cultivating himself with tranquility and nourishing his virtue with frugality. Without detachment one cannot make his aspiration clear; without tranquility one cannot reach far. Learning requires tranquility, and talent requires learning; without learning one cannot broaden his ability, without aspiration one cannot complete his studies. Indolence and dissipation undermine vigor; rashness and restlessness subvert true nature.

—Zhuge Liang