I have been pondering off and on about this passage from Mere Christianity:

He always  sends  errors into  the  world in pairs-pairs of
opposites. And he always encourages us to spend a lot of time thinking
which is the worse. You see why, of course? He relies on your extra
dislike of the one  error to draw you gradually into the opposite one.
But do not let us be fooled. We have to keep our eyes on the goal and
go straight through between both errors. We have no other concern than
that with either of them.

I have been thinking that as we grow in Christ-likeness that the Devil uses more subtle means to deceive us and eventually reverse our direction towards Christl-ikeness.  I feel as though it looks something like this image:

What if at some point, when we get to heaven will will reach, (rather we will be giving) Christ-like ‘singularity’ where we will be perfected and immune to sins of the left or the right.