The believer’s greatest argument is his face. True religion lights up
the face; false religion fills it with insecurity, rage and suspicion.
This is perceptible not only to insiders, but to anyone who maintains
some connection with unsullied primordial human nature in his heart.
The early conversions to Islam often took place among populations that
had no access to the language of the Muslims who now lived among them;
but they were no less profound in consequence. Religion is ultimately
a matter of personal transformation, and no amount of missionary work
will persuade people – with the occasional exception of the disturbed
and the desperate – unless our own transformation is complete enough
to be able to transform others.

Tim Winter (Abdal Hakim Murad)