What is the ideal solution for the weakening of faith and the inability to read the Quran after a period of piety?

Lethargy has causes, including: a weak connection with Allah, laziness in obedience, associating with those of weak resolve, and preoccupation with worldly matters. Its cure involves strengthening the connection with Allah by reciting the Qur'an with contemplation, persistently performing supererogatory acts of worship even if they are few, being keen on righteous and active companionship, reading the biographies of people of strong resolve, and supplicating for steadfastness and assistance.