Straight praying is never born of crooked conduct.
Jesus taught that perseverance is the essential element in prayer.
Those who know God the best are the richest and most powerful in prayer. Little acquaintance with God, and strangeness and coldness to Him, make prayer a rare and feeble thing.
We can do nothing without prayer.
Holy living is essential preparation for prayer.
The resurrection of Jesus Christ was necessary to establish the truth of his mission and put the stamp of all-conquering power on his gospel.