H. Clay Trumbull, Prayer: Its Nature and Scope (New York, Chicago, Toronto: Fleming H. Revell Company, copyright 1896), ch. V, "Limitations of the Right of Prayer," p. 42

Prayer is a privilege, and prayer is a power. But the right of prayer has its essential limitations; and he who asks for that which he has no right to ask, or who asks unqualifiedly for that which he ought to leave it wi…