'Lord, teach us to pray.' None can teach like Jesus, none but Jesus; therefore we call on Him, 'Lord, teach us to pray.' A pupil needs a teacher, who knows his work, who has the gift of teaching, who in patience and love will descend to the pupil's needs. Blessed be God! Jesus is all this and much more. He knows what prayer is. It is Jesus, praying Himself, who teaches to pray. He knows what prayer is. He learned it amid the trials and tears of His earthly life. In heaven it is still His beloved work; His life there is prayer. Nothing delights Him more than to find those whom He can take with Him into the Father's presence, whom He can clothe with power to pray down God's blessing on those around them, whom He can train to be His fellow-workers in the intercession by which the kingdom is to be revealed on earth. He knows how to teach. Now by the urgency of felt need, then by the confidence with which joy inspires. Here by the teaching of the Word, there by the testimony of another believer who knows what it is to have prayer heard. By His Holy Spirit, He has access to our heart, and teaches us to pray by showing us the sin that hinders the prayer, or giving us the assurance that we please God. He teaches, by giving not only thoughts of what to ask or how to ask, but by breathing within us the very spirit of prayer, by living within us as the Great Intercessor. We may indeed and most joyfully say, 'Who teacheth like him?' Jesus never taught His disciples how to preach, only how to pray. He did not speak much of what was needed to preach well, but much of praying well. To know how to speak to God is more than knowing how to speak to man. Not power with men, but power with God is the first thing. Jesus loves to teach us how to pray.
(from 'Lord, Teach us to Pray by Andrew Murray)