When you Work for Allah, sometimes it is one person or two who listens to you or responds to your invitation to come Allah.
Rest of the time you may draw a blank. No one gives you the time of day.
Often, more often than some of us have come to realize or accept, those inviting the world to Allah -- Working for Allah that is -- are subjected to all kinds of trials and tribulations.
And sometimes those trials and tribulations include exile, physical torture, imprisonment and even death.
That is why it is important that those associated with this work in any form and fashion, and to any degree, understand Islam first, second and last.
For, outside Islam there is nothing.