What is the way to get rid of laziness and apathy in worship and restore spiritual vitality?

Lethargy affects all spiritual seekers, and even the Companions and Prophets experienced it. Ibn al-Qayyim says that every doer has a period of inactivity, and the truthful one awaits relief, while the liar turns back on his heels. Umar ibn al-Khattab, may Allah be pleased with him, advised that when hearts are inclined, engage them with supererogatory acts, but when they turn away, confine them to obligatory duties. These periods of inactivity contain wisdom known only to Allah, and through them, the truthful is distinguished from the liar. The truthful one awaits relief and does not despair, humbling himself in submission.