It is in the morals of the believer to strive with every breath to hold firm to the path leading to the pleasure of Allah. This striving is actually the action which we call Taqwa. Toward the end of Surat Al-Kahf, which is recommended to be recited every Friday, it reads: "Say: ‘Shall We tell you the greatest of losers in respect to (their) deeds? Those whose efforts have been wasted in this life while they thought that they were acquiring good by their deeds!’" (18:103-104).