Prayer inculcates humility and a profession of dependence by the believer for starters. It's requisite for our spiritual maturation. Plus, we're commanded to pray. Our desire should be to please God. We notice a maturation process in our prayer life as well as we progress in sanctification, and it becomes less about ME-ME-ME and more about HIM-HIM-HIM.

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Ryan
1689 London Baptist Confession