Abba Pimen says that prayer is the most difficult of all virtues to acquire. It is in prayer that we touch God, that with our mind we are united to God. This is our direct contact with God, our communication with Him. The devil hates this and it is at this time more than any other time that he fights against us. In prayer we must struggle to keep our minds pure and clear from all distractions and totally concentrated on God and immersed in Him.