Q.E.D.
Another Proof .-- He, who lives under the guidance of reason, desires for others the good which he seeks for himself (IV.
xxxvii.); wherefore from seeing someone doing good to his fellow his own endeavour to do good is aided; in other words, he will feel pleasure (III.xi.

note) accompanied by the idea of the benefactor.

Therefore he approves of him.

Q.E.D.
Note .-- Indignation as we defined it (Def.

of the Emotions, xx.) is necessarily evil (IV.