Bhagavad Gita, Chapter 15, Verse 8

When the Lord obtains a body and when He leaves it, He takes these and goes, as the wind takes the scents from their seats the flowers.

A real, familiar image, air carrying scent from place to place, explains something otherwise hard to picture, what actually moves at death.

Comparing the soul's journey between bodies to fragrance traveling on air gives real, physical intuition to an abstract transition. Nothing about the process is left purely theoretical.