“Of all the list of Christian duties there is none to which there is such abounding encouragement as prayer. It is the duty which concerns all. High and low, rich and poor, learned and unlearned – all must pray. Above all, it is a duty in which everything depends on the heart and motive within.
“Our words may be feeble and ill-chosen, and our language broken and ungrammatical, and unworthy to be written down. But if the heart if right, it matters not. He that sits in heaven can spell out the meaning of every petition sent up in the name of Jesus, and can make him that asks know and feel that he receives.”
More J.C. Ryle quotes can be found here