The IFF is guided by the following hadith i.e. that the use of a gentle, nurturing approach begets a stronger conviction:
One of Prophet Mohammed’s friends, a gambler, wanted to convert to Islam because he loved the Prophet. So he asked the Prophet, “Can I become a Muslim?” To which the Prophet replied, “If you promise not to lie whenever you gamble or drink and own up to it, then you may”. And so he converted to Islam but kept drinking and gambling and each time he saw the Prophet and was asked what he was up to, he would own up to it. Until one day, he got to a point where he felt that he could not lie anymore to the Prophet and eventually he stopped gambling and drinking of his own accord without being force.