The sloka Bg 13.21 has been translated as follows by the same author:
the Sanskrit original:
hetuḥ prakṛtir ucyate
bhoktṛtve hetur ucyate
the word for word translation:
kārya — of effect; kāraṇa — and cause; kartṛtve — in the matter of creation; hetuḥ — the instrument; prakṛtiḥ — material nature; ucyate — is said to be; puruṣaḥ — the living entity; sukha — of happiness; duḥkhānām — and distress; bhoktṛtve — in enjoyment; hetuḥ — the instrument; ucyate — is said to be.
Nature is said to be the cause of all material causes and effects, whereas the living entity is the cause of the various sufferings and enjoyments in this world.
question - see below:
whatever desires we feed and struggle to satisfy, develops in us a nature, and this self-developed nature pushes us to desire even further.
how can we explain this situation (with reference from the shastra please)?
person "A" no interest whatsoever in aviation, then in 2014 person "B" who was a pilot, and that triggered "A" the desire to fly airplanes, this made "A" go through a long process to become a pilot, and today "A" love airplanes.
where does the "bija" (seed) of desires come from?