The Bible. Specifically: The Book Of Job -> Provided me with better wisdom and understanding.. gave me better understanding of God and how he works. Proverbs -> Provides wisdom on a daily basis. John -> The two most valuable commandments: (Put your trust in the higher power, love others as yourself) . Its the only book I can go back to daily and leave with overwhelming peace. Also taught me to find a new "power" in faith which I never could find with logic alone.