When we have begun to experience the pleasure found in using the mind, when we have seen the utility to be derived from it, and when we have freed ourselves from the greater passions and have become disgusted by the sensible pleasures that, when we indiscriminately give in to the passions, invariablydominate, or rather, tyrannize reason, we then need no passions other than those of which we have just spoken in order to rouse our attentiveness for subjects on which we wish to meditate.