I wholly agree with this point.
To me this is the same principle of sagacity in exhortation which the holy
Qur’ān has presented -- in its immortal style-- in case of the People of the
Book: ‘O People of the Book, come to that which is similar between you and us …’
(3:113). Exhortation should always be carried from agreement to disagreement,
and accepted to controversial. Those points which the addressee acknowledges,
which are not strange to him, starting from their confession and affirmation,
movement should be gradual to those matters which are an inevitable corollary of
these facts so that the addressee, while moving from the familiar to the
unfamiliar, leans, imperceptibly, towards those facts which any advocate of the
truth wants to get acknowledged.