Readers who are familiar with the Four Levels of Happiness will recognize that ultimate happiness can only occur through the satisfaction of our desires for perfect truth, love, justice (goodness), beauty, and home (see the free video and article on the Four Levels of Happiness.
As we show in other resources, God alone is perfect truth, love, justice (goodness), beauty, and home (see the free resources on this website at the bottom of this article on proofs of God and evidence of God from physics, as well as evidence for our transphysical soul from near death experiences).
This means that God alone will be able to completely satisfy us. As Augustine said at the beginning of The Confessions: “For you have made us for yourself, and our hearts are restless until they rest in you.”