A man requested to be instructed with some formula of Dhikr which will serve the purpose of reforming him. Hadhrat Thanvi said:
“Islah is achieved by remedying the aliments of the nafs. Adhkar are like medicines and pills which can be prepared by studying medical books. However, there remains the indispensable need for a doctor to diagnose the illness and prescribe the remedy. Similarly, dhikr formulas and spiritual exercise (ashghal) are recorded in books. However, there remains the need for a Shaykh to diagnose the aliment of the nafs and to prescribe remedies for its reformation.”
Wazaif are not too difficult upon the nafs. Within a short while the Thikr is completed, whereas the ailments of ujub (vanity) and riya show, for example, are not cured by only wazaif. Wazaif only create barkat and act as aids.