While the mind can know many things "about" God, it can never really know Him personally. God is a spirit. And the personhood of God-His great love, His power, His wisdom-are unseen spiritual realities, realities that can only be touched and understood by the heart.
This little book, with its thirty-one daily devotionals, is about how you can know God simply by waiting on Him to be God. The key is to wait for Him in your heart each day as you seek His face. As you give Him your heart, God will give you much more than the things you've been asking Him for; He will give you Himself! He will show you His love as you wait. And He will reveal to you the great mystery Paul refers to in Colossians 1:27, the mystery of "Christ in me, the hope of Glory."
I have been a Christian for over fifty years, and for most of that time, my walk with God was hampered by my own weakness and habitual sin. There were times I almost gave up hope of ever being free of my addictions until, finally, inspired by the writings of Andrew Murray's book, Waiting on God, I stopped struggling, rested in the Lord, and began waiting on Him to do for me the things I could not do for myself.
The practice of waiting on God has been, for me, the life-changing breakthrough I've been looking for all my adult life. It's the means by which Christ set me free to walk with Him unashamed and the means by which I can experience His peace and the joy of His fellowship in a new and wonderful way.
Waiting on God has become my greatest happiness. I pray it will become yours as well.