They (atheists) have no idea how the subtle body carries the results of the present body's actions down to the next gross body

Expressions researched:
"They have no idea how the subtle body carries the results of the present body's actions down to the next gross body"

Srimad-Bhagavatam

SB Canto 4

Atheists want evidence for the resultant actions of past activities. Therefore they ask, "Where is the proof that I am suffering and enjoying the resultant actions of past karma?" They have no idea how the subtle body carries the results of the present body's actions down to the next gross body. The present body may be finished grossly, but the subtle body is not finished; it carries the soul to the next body. Actually the gross body is dependent on the subtle body. Therefore the next gross body must suffer and enjoy according to the subtle body. The soul is carried by the subtle body continuously until liberated from gross material bondage.

SB 4.29.59, Translation and Purport

The expert knowers of the Vedic conclusions say that one enjoys or suffers the results of his past activities. But practically it is seen that the body that performed the work in the last birth is already lost. So how is it possible to enjoy or suffer the reactions of that work in a different body?

Atheists want evidence for the resultant actions of past activities. Therefore they ask, "Where is the proof that I am suffering and enjoying the resultant actions of past karma?" They have no idea how the subtle body carries the results of the present body's actions down to the next gross body. The present body may be finished grossly, but the subtle body is not finished; it carries the soul to the next body. Actually the gross body is dependent on the subtle body. Therefore the next gross body must suffer and enjoy according to the subtle body. The soul is carried by the subtle body continuously until liberated from gross material bondage.