Give an appropriate title to the following passage and summarise it in about one-third of its length: Mental emotions (manovikar) are of two kinds – pleasant and unpleasant. A pleasant emotion arises towards someone and can evoke a similar emotion in that person's heart as well, such as anger, virtue, love, etc. If we get angry at someone, that person can in turn become angry with us. One whom we love may, on seeing our love, begin to love us back. Unpleasant emotions, however, always generate a different emotion in the other person’s heart, such as fear, jealousy, etc. The person we fear will not, because of our fear, start fearing us. The one on whom we show pity will not feel pity toward us but rather reverence. The one we envy will not envy us back but will instead recognise merit. Pleasant emotions quickly intensify when they meet similar emotions; therefore we must be very careful with them. Unpleasant emotions mingle with opposite emotions, so they cannot grow much. One should regard the wish to let emotions arise—or not arise—as something independent of the emotions themselves.