Kabir Das was a popular 15th-century Indian mystic poet and saint having written hundreds of poems. These poems, translated into English by the great Indian poet Rabindranath Tagore, were first published in 1915. Here’s one of his poems where he talks about seeking the One.
Passage
All things are created by the Om;
The love-form is His body.
He is without form, without quality, without decay:
Seek thou union with Him!
But that formless God takes a thousand forms in the eyes of His creatures:
He is pure and indestructible,
His form is infinite and fathomless,
He dances in rapture, and waves of form arise from His dance.
The body and the mind cannot contain themselves, when they are touched by His great joy.
He is immersed in all consciousness, all joys, and all sorrows;
He has no beginning and no end;
He holds all within His bliss.
Rabindranath Tagore. The Songs of Kabir. The Macmillan Company, 1915.