During the interval between a supplication and its acceptance one is often subjected to trial after trial, some of which are back-breaking. A persevering and good-natured supplicant smells the perfume of the favours of his Lord in these trials and difficulties and his intelligence informs him that they will be followed by help. One aspect of these trials is that they foster eagerness for prayer. The greater the distress of the supplicant, the more his soul will be melted. This is one of the factors in the acceptance of prayer. So one should not lose heart and should not think ill of God through impatience and restlessness. One should never think that one’s prayer is not accepted or will not be accepted. Such a notion is a denial of the attribute of God that He accepts prayers.
Hazrat Mirza Ghulam Ahmad (as), The Essence of Islam – Volume II (Tilford, Surrey: Islam International Publications Ltd., 2004), 222.