22 Jesus answered, “Have faith in God. 23 The truth is, you can say to this mountain, ‘Go, mountain, fall into the sea.’ And if you have no doubts in your mind and believe that what you say will happen, then God will do it for you. 24 So I tell you to ask for what you want in prayer. And if you believe that you have received those things, then they will be yours. 25 When you are praying and you remember that you are angry with another person about something, forgive that person. Forgive them so that your Father in heaven will also forgive your sins.”
One of the things that makes Jesus' teaching here so powerful is this: "Receiving" is not based on "seeing" or "feeling"; it's based on BELIEVING. If it was based on seeing or feeling, then Jesus wouldn't need to tell us what He says in these verses. He's trying to get across that we have to be so convinced in our hearts that we've received (that His promises are true) that it doesn't matter what the circumstances say or indicate.