Answered by Sayyidi Habib Umar bin Hafiz (may Allah protect him and benefit us by him)
I live with non-Muslims, some of whom are interested in Islam. What can I do to convey the message of Islam to them?
You should tell them that through uttering the testification of faith mankind is raised by freeing himself from created things. You should tell them about the Messenger of Allah ﷺ: his mercy and compassion, his awesome character and his benefit and service to mankind. The meanings of the testification of faith will thus become ingrained in their minds. Showing them good character, having good dealings with them and giving them gifts will assist in this.