We probably shouldn’t use prayer manuals with pre-written jargon that we can mindlessly recite. Not even the Lord’s prayer should be considered a magical formula that works even though we pronounce it while the mind wanders elsewhere.
If anything, the Lord’s prayer — or other prayers that we may admire for their theology, their poetry and their balance — should be an inspiration or a teaching. It should not be considered a mathematical formula that if re-employed with exactitude will wrest from Heaven miracles. What matters is your sincerity. And maybe focus.
I don’t think I’ve ever prayed a “perfect” prayer. And I have prayed many prayers. My ever-tenacious sin always bleeds in.
God is merciful. He has answered more prayers than I deserve. He has seen through my vile carnality to some glimmer of anguish, some desperate plea for Him to do what I cannot do, and He has responded.
Don’t look for perfect prayers. Try to have a perfect heart.