Linguistically speaking,
Monotheism means: making the thing as "one" whole entity which
does not admit partition nor be followed by numeration as well as
independent of itself and which stems not from anything nor
unites with anything and this cannot be unless with negation and
affirmation, that is, negating the existence of the second one,
then affirming the first as being the one who is not followed by
a second as His replica like bearing witness that:
"There is no deity but Allah." No
deity " is used in the form of negation, and (But Allah) is
expressed in affirmation i.e. we confirm His existence by
negating the existence of anyone else as being His
Associate.
Building on the foregoing, there
is an instinctive feeling in man that there denotes the existence
of a great power in the universe felt now and then particularly
in time of urgent need or misfortune. Really, he needs such help
to support his weakness and ensure his safety.
To this effect, he spared no
effort in presenting that by finding it once in the sun or
planets or fire and once in an idol he creates by his hands to
worship it or a cow by approaching it or anything else believing
that this worshipped one is able to grant him security, safety
and sustenance which he ever needs and rids him of the evil
spirits and ghosts, catastrophes and diseases and therefore goes
on offering it gifts, rewards and vows to win its approval and
consent.
This is true in case no religion
has reached him at all or any divine message which can serve as a
guiding hand to him towards leading to the right path, truth and
uprightness. Then it began to be crystal clear to him that there
is a great Creator who created for man this gigantic universe
whose knowledge of Him has slipped his mind–that is namely:
Allah, to whom be ascribed all glory and perfection. Hence, he
should know Allah is and how he should be aware of
Him?!
There is no doubt that Monotheism
and the rejection of polytheism are of the most significant
theological subjects which have absolutely come ahead of the
teachings and the whole body of the divine concepts which all the
messengers and prophets had spread to their people in their
scriptures and their hadiths.
Based on this criterion,
Monotheism is a big issue which encounters man in his life that
necessitates him to possess full knowledge of Allah, the
Almighty, because is the only means which can lead him to rescue
and happiness in this world and in the hereafter.
Monotheism is one of the greatest
prerequisites of any divine religion as it is the first origin of
any origin in religion and priority is to be given to it as all
divine religions are built on it.