The character of the Caller to Islam
Question:
Whay should be the qualities of one who invites to Allah?
Answer:
He should be diligent in seeking knowledge, and struggle in being aware of the shari'ah proofs. He should expand all of his energies in calling the people to singling out Allah in worship, following His Shariah, abiding by His orders and prohibitions, with his entire self, struggling to bring about the judgements of the Shariah untill he reaches the rank of those who invite to Allah Almighty in his speech, actions, conduct, and character. Indeed With Allah is the facilitation to do what is right.
Source:
Shaykh `Abdul-`Azeez Bin Baz
Fatawa Islamiyah Darussalam VOL:8 NO.46