Jesus told us how to tell if we were in faith in Mark’s Gospel:
And Jesus answered saying to them, “Have faith in God. Truly I say to you, whoever says to this mountain, ‘Be taken up and cast into the sea, and does not doubt in his heart, but believes that what he says is going to happen. It will be granted him. Therefore, I say to you, all things for which you pray and ask, believe that you have received them and they will be granted you.” Mark 11:22-24
If we do, then we are in faith, if not, we are not. Faith is a settled knowing that it will happen, and we no longer have to even think about it. Faith is like throwing a ball in the air and not having to look up to see if it will come back down. Unbelief finishes the prayer wondering if an answer will come back down from Heaven. It won’t. Faith knows that it will, it just does not know exactly when.
It is easy to receive when one has faith, and impossible when one does not. The effort then is to have faith. Read about faith, study the Bible, meditate on the scriptures, and spend quiet time with God. Faith comes by hearing, and God usually speaks in a quiet time with to the scriptures that have already been put in the heart. Faith comes from God, but only as we put His word into our hearts and seek Him. We receive the answer by faith now so that we can receive it later in reality.