Guiding people, teaching them and advising them opens up a door of guidance for an individual – since the reward for an action is its like – every time he guides someone and teaches him, then Allaah will (further) guide him and teach him.

Therefore, he will become a guide and guided, as occurs in the supplication of the Messenger of Allaah, which has been reported by at-Tirmidhee and others:

"O Allaah, beautify us with the adornment of eemaan, make us guides (for others), guided, not astray, leading others astray, peaceful to Your close friends (awliyaa), warring with Your enemies. With Your love do we love those who love You and with Your enmity do we show enmity to those who oppose You."

~ IBNU QAYYIM AL-JOWZY ~