This part four (final) video of the lecture/discussion, given by Dr Mohammad Hilaal bin Abu Bakar, a qualified dentist and practicing solicitor at Darussalam, London, UK on Sunday, 5th July 2009. Two topics were presented during the current series theme, which is called the Ramadan Preparation Retreat. First topic is about Al-Birr Quality (please refer Surah Al-Baqarah, 2: 177) - where the discussion are about those people whom Allah has categorised as "Al Birr" and second topic is about DU'A - HOW TO MAKE IT MORE EFFECTIVE, which discuss why some du'as are not answered, how to make our du'a more potent, the best times to make du'a and also some innovations concerning du'a.