Often we pray and nothing happens. It almost seems as if Jesus isn’t hearing us. However Bartimeus the blind beggar in the Gospel of Mark teaches us differently.
When he hears of Jesus coming he cries out ”Son of David have mercy on me”. Everyone is so disturbed by this but he shouts out all the more.
46] And they came to Jericho: and as he went out of Jericho, with his disciples, and a very great multitude, Bartimeus the blind man, the son of Timeus, sat by the way side begging.  Who when he had heard, that it was Jesus of Nazareth, began to cry out, and to say: Jesus son of David, have mercy on me.  And many rebuked him, that he might hold his peace; but he cried a great deal the more: Son of David, have mercy on me.  And Jesus, standing still, commanded him to be called. And they call the blind man, saying to him: Be of better comfort: arise, he calleth thee.  Who casting off his garment leaped up, and came to him.
St.Monica, mother of Augustine, cried for the conversion of her son and her husband. Only on the fathers death bed did all these things come to pass. That’s how long it took.
Prayer requires ”Prosohi” (”Attention”).
There is another story of a man who comes to the monk and complains that when he prays nothing happens. He doesn’t feel it’s effects at all.
The elder gives him a dirty old bucket and asks the man to go down to the river and fill the bucket and bring it back to him.
The novice does as he’s told and comes back with the bucket but on the way it had leaked and there was no water left in it. He did again and by the third time he did it complained that the water kept leaking and that there was no use.
The monk asked the novice to peer into the bucket and sure enough the bucket which was once dirty was now very clean.
The power of prayer and the point of prayer is not really to be this sort of thing we do and expect immediate results. Prayer is what cleanses us over time.
We need to continue in our effort to pray and stop treating it as a short term solution to our problems.