Congratulations on embracing this great Islam and choosing the right direction and leaving the darkness for the light of faith. Congratulations on your courage and determination to find the truth before making the most important decision of your life by embracing this glorious religion! Anyone who buys a new device or joins a club or group or organization, obviously, must study hard and know what they need to get and what the obligations are to do and find a solution to the new situation. In the same way, for those who are blessed by Allah to be delivered from darkness to light (faith) and to be guided and embraced by Islam, they must strive to learn their religious rules in order to worship Allah in accordance with the comprehensive understanding and to be able to adhere to all the four religions. The good news that you must rejoice in the knowledge of Islam is that the information you receive is the legacy of the prophets and messengers, because indeed all the prophets did not leave a legacy of wealth and possessions, only the knowledge they left behind. Whoever acquires this knowledge will surely receive a considerable portion [of the inheritance of the prophets. (Sunan Apu Terwood: 88) Introduction by the author