Is happiness only for married couples?

There are men and women who decide not to marry, not because they scorn or reject it but simply because they feel an exclusive call. For example, priests, monks and nuns witness to the world that the love of God is above all other loves and that it is enough for them. There are also men and women in science, in politics and in other kinds of service who give themselves totally to their calling and who find happiness in the gift of themselves to this calling. Their fidelity to an ideal gives them deep personal satisfaction.