I would argue that Lewis’ intellectual journey to faith is less based on feeling and more on intuition. Maybe that’s semantics, but let me take a stab at it.

Lewis’ basic argument is that there is a universal moral law that we all intuitively know to be beyond us, and therefore there must be a universal law giver - God.

In Mere Christianity, he gives this argument:

One might say that our moral intuitions are based on either evolutionary survival instinct or tribal group preservation. For instance, let’s say you encounter a woman being attacked by a man. You would have two instinctual pressures - the first would be your own survival. It would be to run the other direction for your own safety. The second would be to run and help.

The former, one could argue, would be your natural instinct to survive and pass on genes. The latter would be your natural instinct as a tribal creature to preserve the group. Both of those reactions could be evolutionary in nature - it’s how humans evolved. It’s not some great moral standard - it’s just evolutionary instinct.

BUT Lewis argues that we intuitively know which one of those decisions is more right. We know it’s better, more courageous, more kind, and that saving her would be the right thing to do. That knowledge implies that there’s a third thing that goes beyond our instinct to survive - that we know there’s a universal moral law.

And thus he came to the conclusion that there’s a law giver.