When they applied the antimony of whiteness (which was free from all doubts and prejudices), they could see the immaculateness of the universe (that nothing but the Infinite Reality existed), and the object bearing manifestation also disappears.
Note: In verses No. 20-22 three phenomena are described. The first is about the application of black antimony i.e. materialism. The second is about the red antimony which means ecstacy as a result of love. The third is the white antimony which means absorption in Allah.
دوئی از خود بدر کردم یکی دیدم عالم را،
یکی جویم یکی دانم یکی بینم یکی خوانمْ
(Roomi)
When I put away duality, I find the two worlds as one; One I seek, One I know, One I see and One I read.

Those who used white antimony in their eyes,
Saw no differences but all around white light.