From the Catechism of the Catholic Church, quoting St. Augustine and St. Thomas Aquinas:

We all want to live happily; in the whole human race there is no one who does not assent to this proposition, even before it is fully articulated.

How is it, then, that I seek you, Lord? Since in seeking you, my God, I seek a happy life, let me seek you so that my soul may live, for my body draws life from my soul and my soul draws life from you.

God alone satisfies.