I am always happy if others are happy. If some body is happy with my help, this is a matter of pleasure. Once, I helped some one with money for going from a small lesser known place to Tezpur (Assam). Next day, i went to a restaurant at Tezpur and that person saw me and again expressed thanks. This made me happy.
Helping someone in need surely brings about a sufficient amount of pleasure and happiness among us. The thing to be noted is that the degree of this happiness and satisfaction is different from normal happiness as it has got more pleasure and inner satisfaction in it...