Words of Hadhrat Maulana Yusuf (Rahmatullah Alayh)
One misunderstanding that has sprouted up in the community is that many consider the Dawah activity to be for the invited only, and not for the inviter himself, and that since Dawah has reached everyone, there is practically no need for Dawah at this moment in time. This is a gross misunderstanding. If the invited is impressed by a single session of Dawah of the inviter and relinquishing his past, he enters the fold of Islam, one can imagine the extent to which his impact and Yaqeen (belief) would develop if he (the inviter) consistently engages in Dawah.
Abandoning the Dawah activities has not only led to a total termination of Dawah amongst the Non-Muslims but it has deprived the Muslims of the dynamism of belief and excellence they once enjoyed due to their engagement in this field. Not only are they deprived of excellence but owing to their endeavor contrary to it, belief has slowly dissipated from their hearts. Another common fallacy is that the work of Dawah should be extended to Non-Muslims alone. Whereas just as non-Muslims are invited towards Islam, Muslims are invited to Imaan (faith) and A'amal (good deeds). As Prophet Musa used to invite Pharaoh to accept Islam whilst inviting the Bani-Israel towards Imaan (belief), Salah (prayer), Tawakkul (trust in Allah), salvation from all calamities and towards attaining success in both the worlds.
The intrinsic qualities of Dawah-i.e the strengthening of Yaqeen (belief)- can be achieved by extending Dawah to Non-Muslims, in the same way, it can be attained by extending it to fellow Muslims as well.