What do we mean when we talk of God helping us? by C.S. Lewis

Yes, but what do we mean  when  we talk of God helping us?  We
mean God putting into us a bit of Himself, so to speak. He lends us a little
of His reasoning powers and that  is how we think: He puts  a little  of His
love  into  us and that is how  we  love one another. When you teach a child
writing, you hold its hand while it forms the letters: that is, it forms the
letters  because you are forming them. We love  and reason because God loves
and  reasons and holds  our hand while we  do it.  Now if we had not fallen,
that would be all plain sailing. But unfortunately we now need God's help in
order to do  something which God, in His own  nature,  never does  at all-to
surrender, to suffer, to submit, to die. Nothing in God's nature corresponds
to this  process at  all.  So that the one road for  which we now need God's
leadership most of  all is a  road God, in His own nature, has never walked.
God can share only what He has: this thing, in His own nature, He has not.
     But supposing God became  a  man-suppose  our  human  nature which  can
suffer and  die  was amalgamated  with God's  nature in one person-then that
person  could help us. He could surrender  His  will, and  suffer  and  die,
because He was man; and He could do it perfectly because He was God. You and
I can go through this process only if  God does it in us; but  God can do it
only if He becomes  man. Our attempts at this dying  will succeed only if we
men  share in God's dying, just as our thinking can  succeed only because it
is a drop out of  the ocean of His  intelligence: but we cannot share  God's
dying unless God dies; and He cannot die  except by being a man. That is the
sense in which He pays our debt, and suffers for us what He Himself need not
suffer at all.

C.S. Lewis, Mere Christianity, www.lib.ru/LEWISCL/mere_engl.txt