When we go to God by prayer, the devil knows we go to fetch strength against him, and therefore he opposes us all he can.
God can pick sense out of a confused prayer.
When we shoot an arrow, we look to the fall of it; when we send a ship to sea, we look for its return; and when we sow seed, we look for a harvest; so likewise when we sow our prayers, through Christ, in God's bosom, shall we not look for an answer and observe how we speed? It is a seed of atheism to pray and not to look how we speed. But a sincere Christian will pray and wait, and strengthen his heart with promises out of the Word, and never leave praying and looking up till God gives him a gracious answer.