Bhagavad Gita : अध्याय 13 का श्लोक 33
यथा प्रकाशयत्येकः कृत्स्नं लोकमिमं रविः ।
क्षेत्रं क्षेत्री तथा कृत्स्नं प्रकाशयति भारत ॥
भावार्थ : हे अर्जुन! जिस प्रकार एक ही सूर्य इस सम्पूर्ण ब्रह्माण्ड को प्रकाशित करता है, उसी प्रकार एक ही आत्मा सम्पूर्ण क्षेत्र को प्रकाशित करता है॥33॥
The sky, due to its subtle nature, does not mix with anything, although it is all-pervading. Similarly, the soul, situated in Brahman vision, does not mix with the body, though situated in that body.
The air enters into water, mud, stool and whatever else is there; still it does not mix with anything. Similarly, the living entity, even though situated in varieties of bodies, is aloof from them due to his subtle nature. Therefore it is impossible to see with the material eyes how the living entity is in contact with this body and how he is out of it after the destruction of the body. No one in science can ascertain this.