Man undergoes a state of both spiritual contraction (qabz) and spiritual expansion (bast). In the state of spiritual expansion, one’s pleasure and delight in worship heightens, the heart is opened, one’s inclination towards God increases, and warmth and comfort is derived from the Prayer. However, on certain occasions, man experiences a state in which this passion and eagerness is lost and the heart becomes constricted. When this state of affairs arises, one should seek forgiveness from Allah profusely, invoke salutations upon the Holy Prophetsa abundantly, and offer Prayer again and again. This is the only way to do away with one’s state of spiritual contraction of the heart.
(Hazrat Mirza Ghulam Ahmadas, Malfuzat, Vol. 2, p. 15)