This is based on the ego belief that they are not already perfect, complete, holy, innocent etc. Life probably sucks in some way, and this compels them to search for greater meaning or truth.
The problem is we have two identities rolled into one. The ego is one identity. Our Real Self is the other. The problem is we've become attached to, identified with, and confused with the ego. It wants us to think it is what we are and that we are nothing else. This gives us the impression we have one self, a separate self, but in fact we have another self - a Real Self, which is actually all of who we are.
So then as we become compelled by pain and suffering to 'seek for a better way', it's who we THINK we are that starts to seek. And that means, it's us plus the ego. The ego is along for the ride. And the ego will bring with it all of its baggage and misunderstanding and misinterpretation. And that's also what happens when anyone starts to study A Course in Miracles - they will filter it through their ego, bigtime, not really understand or accept it, and will distort the living crap out of it. I know because I did this too.
So what's happening is, the ego wants to compel us to be always seeking and never finding. It wants to take us away from accepting or having or being. So then we - the ego-infested self, starts to seek for the truth. And this might surprise you that the ego seeks for the truth, but seeking the truth and actually finding the truth are very different things. Seeking does NOT lead to finding! It's a trick. Seeking the truth actually takes you AWAY from the truth, because the truth is always PRESENT already. Any form of searching is actually a blindfold.
So at first, we want to be more spiritual because we cannot see that we already HAVE everything God gave us. That's because we have blocks to awareness. And so we'll go off seeking, and actually will take ourselves onto tangents and directions that actually lead AWAY from truth. And you will find as you do this, that you start to SACRIFICE. Ie you'll start to give up on things that were in your life that you suspect maybe are the definition of 'not spiritual'. You'll misinterpret the truth and think it's calling for you to give up stuff, to give up forms and people and things you enjoy, because your ego does not understand the truth. It comes to its own conclusions.
And then as you get to grips with the Course a bit more the ego gets undone a bit and you make some progress, but you also start to become a 'spiritual ego', or rather, you start trying to act like you are 'special' in your spirituality. You will spiritualize things in the world. You'll try to sound like you are spiritual. You'll try to act like you're spiritual. You'll basically try to 'integrate' spiritual truth into your EGO life, which is a realm of form and behavior. So the ego is trying to keep its life and the ways of living that it is used to, but bring the truth 'into' that realm so that the ego is retained. Yet it's quite possible to fill your life with a combination of sacrifice and spiritual specialness, to create the ILLUSION that you are becoming more truth-filled. The ego loves that you're thinking of being a spiritual savior/hero ;-)
At some point after this if you are making true progress through sincere honesty, purification, letting go, healing, surrender, and seeing through your OWN ego lies, you will see through the ego's efforts to seek, and all of these activities you've been doing even with the Course to try to 'get to' where the truth is. You'll learn more that the truth is already present, and that God is already present, and that even in your spiritual seeking it has been taking you AWAY from what is. So now your 'path', what's left of it, now becomes more like a form of surrendering, stopping searching, relinquishing trying so hard, maybe even letting go of sacrifice and opening up to reclaiming into your life things which are 'okay' that you thought were 'un-spiritual' before. You may start to bring joy back into your life. And you will start practice a simpler art of acceptance, listening to God, communing with God, being present, becoming aware of what is, and letting go of every 'block' that was telling you you needed to be a spiritual seeker to get back everything you don't have.
Even though the Course says you need to undo the blocks to awareness, to reveal the love that cannot be taught, which is hidden but already present underneath those blocks, the spiritual ego seeks to find love by seeking for it where it does not exist - externally. And instead of actually working on the undoing of those blocks, it would happily spend its time working on the 'accumulation' of 'spiritual information', intellectual understanding, special powers and so on, so long as you avoid actually healing the root cause of the spiritual seeking itself.
If you were to actually look within and see there is no sin, and heal the sense of lack, you would find the truth, but the ego does not want that, so it has you seeking everywhere that the truth is not. And then when you don't find the truth, the ego is happy that you might give up seeking and go back to ignorant unconsciousness. But what if instead you decide the ego was lying to you and you learn to stop trusting its voice? Maybe you become aware of a deeper truth that transcends it, and which is already in you. And maybe, as you realize the ego led you in the wrong direction, this will finally teach you what the right direction is - within! And so the ego has helped you awaken.
The real truth then starts to reveal itself. That you already have everything God gave you. You already are how he wants you (in Spirit, not form). That you are already loveable. That you are already forgiven. That nothing has really happened etc. And so you approach the real atonement, and true forgiveness, and Holy Spirit's mind of stillness and peace. You stop so much being a spiritual seeker as a spiritual finder, realizing the seeking stops you from finding, and the truth is already here. It was here in front of your nose all along, this whole time that you thought it was somewhere else. And so now you have uncovered the truth of who and what you are and have returned home to yourself in God. This is "the journey without distance", back to the True Self that you already are.
What comes next I have no idea, haha! To be continued...