The news about Him spread all the more, so that crowds of people came to hear him and to be healed of their sicknesses. But Jesus often withdrew to lonely places and prayed. (Luke 5:15-16)
Jesus kept His priorities straight. He never let the demands upon His powers to heal, crowd out His need for prayer. I suppose His disciples thought that He was being extremely selfish in this matter. While Jesus was off praying, multitudes were suffering. Apparently, Jesus had this tremendous nee