The Promised Messiah (as) & Imam Mahdi (Guided One), Hazrat Mirza Ghulam Ahmad (as)
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 Prophet (sa) 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. 
- The Promised Messiah (as), Malfuzat-Volume 2, (Islam International Publications Ltd., 2019), 15.