Novices Calvin and Ananda

According to Buddhism for a man to be perfect there are two qualities that he should develop equally: compassion on one side, and wisdom on the other. Here compassion represents love, charity, kindness, tolerance and such noble qualities on the emotional side, or qualities of the heart, while wisdom would stand for the intellectual side or the qualities of the mind. If one develops only the emotional neglecting the intellectual, one may become a good-hearted fool; while to develop only the intellectual side neglecting the emotional may turn one into a hardheaded intellect without feeling for others. Therefore, to be perfect one has to develop both equally. That is the aim of the Buddhist way of life: in it wisdom and compassion are inseparably linked together.

— Walpola Rahula, What the Buddha Taught