Most people spend their lives trying to make their heart’s fondest dreams come true. Isn’t that what life is all about, ‘the pursuit of happiness’? We search endlessly for ways to acquire the things we desire, and we are willing to sacrifice much to achieve them. We never imagine that getting our heart’s deepest desires might be the worst thing that can ever happen to us.

…If we look to some created thing to give us the meaning, hope and happiness that only God himself can give, it will eventually fail to deliver and break our hearts.

There is within the human heart a tough fibrous root of fallen life whose nature is to possess, always to possess. It covets "things" with a deep and fierce passion. Ht pronouns "my" and "mine" look innocent enough in print, but their constant and universal use is significant.  .... God's gift now take the place of God, and the whole course of nature is upset by the monstrous substitution

The pursuit of God, AW Tozer, the blessedness of possessing nothing, location 192

If I find in myself a desire which no experience in this world can satisfy, the most probable explanation is that I was made for another world

C.S. Lewis

Most people, if they have really learned to look into their own hearts, would know that they do want, and want acutely, something that cannot be had in this world. There are all sorts of things in this world that offer to give it to you, but they never quite keep their promise. The longings which arise in us when we first fall in love, or first think of some foreign country, or first take up some subject that excites us, are longings which nor marriage, no travel, no learning, can really satisfy. I am not now speaking of what would be ordinarily called unsuccessful marriages, or holidays, or learned careers. I am speaking of the best possible ones. There was something we have grasped at, in that first moment of longing, which just fades away in the reality. I think everyone knows what I mean. The wife may be a good wife, and the hotels and the scenery may have been excellent, and chemistry may be a very interesting job: but something has evaded us.

C.S. Lewis - Mere Christianity