What is the way to return to focus in worship and love of supererogatory acts after feeling unable to do so, and is there a hidden sin that could be the cause?

Lack of concentration in worship and disinterest in supererogatory acts stem from several reasons, including: extremism in religion, excessive indulgence in permissible matters, infrequent remembrance of death and the Hereafter, shortcomings in obligatory duties, keeping bad company, and falling into sins.

For a remedy, the following are recommended: 1. Avoiding sins. 2. Adhering to the daily and nightly routines (of worship). 3. Utilizing virtuous times. 4. Keeping the company of the righteous. 5. Understanding Allah's sunan (divine laws) regarding trials. 6. Recognizing the devil's entry points. 7. Allowing the self a permissible measure of rest. 8. Reflecting on the lives of the early Muslims (Salaf) and emulating them. 9. Remembering death and what comes after it. 10. Acquiring beneficial knowledge. 11. Continuously holding oneself accountable.