1John 5:14 And this is the confidence that we have in him, that, if we ask any thing according to his will, he heareth us:
15 And if we know that he hear us, whatsoever we ask, we know that we have the petitions that we desired of him.
We know God’s word is truth. So if by God’s word we ask for what we desire he hears us and we have what we asked for. In acting out our faith we don’t believe because we see it but because God’s word says so.
Let’s say I ask God for a pen. As soon as I finish praying I must believe that I have the pen then I shall have it physically. So when I ask God for a laptop, I must believe first that I have the laptop then I will have it physically in my hands through a means God will provide. That is demonstration of faith in praying for our needs. This is of the heart or spirit. It is a deep assurance that indeed it is done. This will prevent you from praying about it again. Of course how can you pray for something you already are convinced has been done for you? You only give thanks to God that it is done for you. This will prevent you from worrying about it again. There will be peace in your heart because you have the assurance that it is done and are only waiting for its manifestation.