This year, or this month, or, more likely, this very day, we have failed to practise ourselves the kind of behaviour we expect from other people. - C. S. Lewis

I do not think that all who choose wrong roads perish; but their rescue consists in being put back on the right road. A sum can be put right: but only by going back til you find the error and working it afresh from that point, never by simply going on. Evil can be undone, but it cannot 'develop' into good. Time does not heal it. The spell must be unwound, bit by bit, 'with backward mutters of dissevering power' — or else not.

And she never could remember; and ever since that day what Lucy means by a good story is a story which reminds her of the forgotten story in the Magician's Book.

Progress means getting nearer to the place you want to be. And if you have taken a wrong turn, then to go forward does not get you any nearer.
If you are on the wrong road, progress means doing an about-turn and walking back to the right road; and in that case the man who turns back soonest is the most progressive man.