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  • ArticlesOfTheIslamicFaithByGhazali, page : 217

with the tongue, or with the senses; but the best is the submission
with the mind. It is that acceptance which is called

belief.

The use of the terms Islam and belief as two different words
of different meanings, as related terms, the one being a part

of the other, and as synonyms, does not overstep the possibilities
which the language allows. Their use as different terms

of different meanings makes belief signify acceptance with
the mind only, which signification conforms to the dictates
of language; it makes Islam signify submission outwardly,

which thing is also in harmony with the requirements of language.
For the submission in part is also called submission,