Very inspiring! I especially appreciated the account of his discovery that prayer should include, besides us talking to God, some time in silence to be able to hear what God is saying to us.
My mother bought me this book when I was young. It has been a number of years since I read it but I remember how much it inspired me and I've kept it to pass on to my son in the hopes that it will have the same impact on him. Christian or not, it is very inspirational and well worth the read.