Question - Who is God ? Why He is one and only ?
Answer -
There are various answers , logics etc for this questions.
But I want to understand the answer of this question , as a common man ....
An easy and very straight forward way .........
1) In the absence of a force , motions are random and uncontrolled. But if a definite and powerful force exist , the motion is very certain and controlled .....
a)When we see the universe , we find it very ordered , certain and
controlled.
b) If we see , even in our solar system, all planet and related things are in
very definite order.
c) If we see , with in earth , we see days-nigh , seasons , river , sea, every
thing very orderly and very controlled.
d) If we see , with in human body , every organ , every system work in very
orderly manner.
e) If we see , with in organ ... at cell/Atom level ...... we find the same order
From Micro level and Mega-Mega Universe level , we observe same order , certainty and control. This means there is a force or power , which exist and control every thing of this universe, from micro to Mega level.
and That is "The God ( Allah, Permeshar , Almighty )".
2) If there are one and more controlling force , it will contradict each other or it will cancel or fight with each other.
a) But we don't see any such things from micro to Mega level. All motion ,
orders etc are similar, logical and synchronize. ...
b) This clearly tell that God is one and only one....
May be, That's why , most of the Holly books says
I.) Verily in the creation of the heavens and the earth, and in the alternation of night and day, and the
ships which sail through the sea with that which is of use to mankind, and the water (rain) which
Allah sends down from the sky and makes the earth alive therewith after its death, and the moving
(living) creatures of all kinds that He has scattered therein, and in the veering of winds and clouds
which are held between the sky and the earth, are indeed Ayat (proofs, evidence, signs, etc.) for
people of understanding.
Al Quran , Surah AL-Baqara (2), Verse 164
II.) “Ekam evadvitiyam” “He is One only without a second.” [Chandogya Upanishad 6:2:1]
"Ma cid anyad vi sansata sakhayo ma rishanyata" "O friends, do not worship anybody but Him, the Divine One. Praise Him alone." [Rigveda 8:1:1]10
"Devasya samituk parishtutih" "Verily, great is the glory of the Divine Creator." [Rigveda 5:1:81]11