Now we cannot...discover our failure to keep God's law except by trying our very hardest (and then failing). Unless we really try, whatever we say there will always be at the back of our minds the idea that if we try harder next time we shall succeed in being completely good. Thus, in one sense, the road back to God is a road of moral effort, of trying harder and harder. But in another sense it is not trying that is ever going tobring us home. All this trying leads up to the vital moment at which you turn to God and say, "You must do this. I can't.
C. S. LewisThe theory that thought is merely a movement in the brain is, in my opinion, nonsense; for if so, that theory itself would be merely a movement, an event among atoms, which may have speed and direction but of which it would be meaningless to use the words 'true' or 'false'.
C. S. LewisIt is good that the window should be transparent, because the street or garden beyond it is opaque. How if you saw through the garden too? It is no use trying to 'see through' [everything]. If you see through everything, then everything is transparent. But a wholly transparent world is an invisible world. To 'see through' all things is the same as not to see.
C. S. LewisIt is only when you are asked to believe in Reason coming from non-reason that you must cry Halt. Human minds. They do not come from nowhere.
C. S. Lewis