Self-significance

"Writing about man’s obsession with significance and the problems this causes, Stowell, in his excellent and thought-provoking book, Perilous Pursuits, Our Obsession With Significance, writes: “We are built for significance. Our problem is not that we search for it, but that we search for it in all the wrong places…”62
True significance is never secured through our efforts or by our status or recognition or from the applause of men or by the attention and affirmation of others. Instead, true significance is founded and secured for us through the finished work of Christ on the cross. Even with this being true, we somehow feel compelled to magnify ourselves or seek to be magnified by others in search of significance through the various methods or human strategies man attempts to use. These include people’s incessant scramble up the proverbial ladder for position, power, praise, applause, recognition, possessions, etc. Ironically, like broken cisterns that hold no water (Jer. 2:13), such things never satisfy our cravings for significance no matter how much we have of the things we seek? Because the source is wrong and contrary to our intended purpose by God who created us, the craving for more will always exist whether it’s power or praise or money.
None of us is exempt from this significance pursuit, to the point where the pursuit often become a significance obsession. Our problem is that we look for significance in all the wrong places. We pursue prosperity, power, position, belonging, identity, and affirmation in hopes of finally securing a sense of value and worth.
To make matters worse, this pursuit is complicated by three basic drives: pleasure, pride, and passion.…63
In other words, and this is the point with regard to self-control, man’s obsession with significance forms a tremendous obstacle to self-control and the joyous life and rest God wants us to have in Christ. Actually, the pursuit of significance, like a match in a dry forest, fuels passion, pleasure, and pride. In our quest for significance, our fundamental and God-given desires are fanned into a blazing flame or action. Believing that a BMW, a mansion with a view, or one’s name in lights will give status or prominence in the community, we desire more and more, and bigger and better. Because we were created for significance, we are all inherently driven by a compelling need to believe that we are significant to some degree. As R. C Sproul says, “We are driven to believe that in some way we are important. This inner drive is as intense as our need for water and oxygen.”64 Feeling significant comes as we believe we have worth, value, and dignity. Significance is knowing that our existence has made a difference after all. It doesn’t have to be a great difference, just a difference. Significance is what makes a pat on the back so important. It’s why affirmation is so vital. We believe we count when someone says we count. Having value and dignity are important, but depending on how we seek them, we can be deluded and consumed by the search."

Question: Christians are supposed to find their self-worth in what Christ has done for them and in their identity as children of God. What exactly do these things mean? I know I'm a child of God, but knowing and believing this with my head doesn't really do much... How is this supposed to give a person self-worth?