It was narrated from Abu Hurairah that: The Messenger of Allah SAW was asked: "Which deed is best?" "He said: Faith in Allah SWT and His messenger SAW".
The Prophet Muhammad [SAW] was asked which deed was best, and he replied with this hadith which emphasizes the importance of having faith in Allah [SWT] and His messenger [SAW]. Having strong belief in God will lead us on a path towards righteousness as it will help us stay away from sinning or doing wrong deeds. Furthermore, following the teachings of the prophet Muhammad [SAW] will help guide us on how we should live our lives according to Islamic principles such as being kind, generous, honest etc., all while striving for success both spiritually and physically.