A seeker wrote, these days I feel completely listless. There is no enthusiasm at all for anything. This includes no eagerness to perform acts of worship.
Hakim al Umma Maulana Ashraf Ali Thanwi (Allah have mercy on him) replied,
Enthusiasm is not a necessary requirement. Performance of acts of worship (in itself) is an essential requirement.
Moreover, acts of worship done without enthusiasm entail hardship and hence carry more reward.
This tip is worth to be remembered forever.
Rafa adh dheeq an ahl tareeq, Muqalat e Hakim al Ummat, vol 14, page 72