Power of prayer

Can you recall the power of prayer? Of answered prayers? Let the following quote stir your soul; "The reason why many fail in battle is because they wait until the hour of battle. The reason why others succeed is because they have gained their victory on their knees long before the battle came. Anticipate your battles; fight them on your knees before temptation comes, and you will always have victory." I'm sorry I can't remember who said that, so I hope I am quoting him adequately...bottom line, pray, not just for answers prayers, but to also grow closer to the one true and living God.