Wrestling with God

Just discovered Oswald Chambers 'My Utmost For His Highest'. Have wanted to read it for years but having picked up a cheap edition (updated version) I can we what the fuss is about. There are deep insights of the sort I haven't seen elsewhere.  

Take the entry for December 16th, which begins (commenting on Ephesians 6:13,18 - whole armour of God):

You must learn to wrestle against the things that hinder your communication with God, and wrestle in prayer for other people; but to wrestle with God is unscriptural. If you ever do wrestle with God, you will be crippled for the rest of your life. If you grab hold of God and wrestle with Him, as Jacob did, simply because He is working in a way that doesn't meet with your approval, you force Him to put you out of joint (see Genesis 32:24,25). Don't become a cripple by wrestling with the ways of God, but be someone who wrestles before God with the things of the world, because "we are more than conquerors through Him..." (Romans 8:37)