Observe any doubts or limiting beliefs that come across the screen of your mind once you state your intention. Once you say this clear intention, listen for a moment. If any doubts arise that you really can have what you desire, write them down. Intentions cannot manifest if you have any beliefs that block them. The vibration of doubt creates nothing but what we had before.
Intentions mean serious business.
Back to our example. Listen to what the mind has to say, or journal about it. These beliefs block you from your prayer being answered. Change your limiting beliefs. It will take some time and effort to shift them, because they have been part of your life script for so long.