The plurality has emanated from the unity. The fact is that both of them originate from the Prime of everything- the Infinite, the Unique Allah. (The creatures implying plurality have emanated from the Creator, which signifies Unity. That is monism par excellence). Verily there is the One Transcedental Being. There is nothing outside or beside Him. Do not be misled in this connection. I swear by Allah that nothing else exists. All what you hear in this connection is a mere noise and speculation, originated by Him.
افلاک و عناصر و موائد اعضٗا
توحید ہمیں است دگرہا ہمہ فن
(Roomi)
The heavens and the elements are the limbs of the “Body of Allah”. This is the Unity, and all else is deception
ای روی کشیدہ ببازار آمدہ
خلقی بایں طلسم گرفتار آمدہ
(Sanai)
O you who have concealed your countenance but manifested yourself through your creatures in different forms! You have thus caught the mankind in this play of jugglery.
Life is but a walking shadow, a poor player, that struts and frets his hour on the stage. And then is heard no more. It is a tale told by an idiot, full of sound and fury, signifying nothing. (Shakespeare, Macbeth).

Unity to diversity led, diversity, unity's outcome,
Truth is one, be not forgetful this,
I swear, existence tumulous glamour His reflection is.

From One, many to being came; 'many' but Oneness is;
Don't get confounded, Reality is 'One',
this truth don't miss Commotions vast display
All this I vow, of Loved one is.

Unity to diversity led, diversity, Unity's outcome,
Truth is one, be not forgetful of this,
I swear, existence tumultuous glamour His reflection is.

Plurality is unity, unity is all plurality,
Truth is one, don't be misled by any gossip,
All this turmoil is because of Beloved.