Wisdom may be characterized as the ability to make good decisions based on knowledge and experience. Wise behavior, which considers all relevant information, should have a plan for any course of action. Accordingly, wisdom entails being prudent and sensible. It includes taking into account long-term considerations and consequences, as well as postponing immediate satisfaction.
Foolishness is the opposite of wisdom. It is expressed in rushed or impulsive decisions and the lack of proper careful considerations. In foolishness we do not assess all relevant information or consider broader, long-term perspectives. Foolishness is more spontaneous and this is what the prevailing romantic ideology demands: act according to the promptings of your loving heart and nothing else is of importance.