The thoughts that encompass all evil are eight in number: those of gluttony, unchastity, avarice, anger, dejection, listlessness, self-esteem and pride. It does not lie within our power to decide whether or not these eight thoughts are going to arise and disturb us. But to dwell on them or not to dwell on them, to excite the passions or not to excite them, does lie within our power.
