Praśna Upaniṣad · 2..10
यदा त्वमभिवर्षस्यथेमाः प्राण ते प्रजाः आनन्दरूपास्तिष्ठन्ति कामायान्नं भविष्यतीति
yadā tvamabhivarṣasyathemāḥ prāṇa te prajāḥ ānandarūpāstiṣṭhanti kāmāyānnaṃ bhaviṣyatīti
When you pour down rain, these creatures of yours, of blissful form, remain thinking: “There will be abundant food according to our desire”.
Prāṇa, as cosmic vital force, also controls natural phenomena. Rain (abhivarṣa) is essential for life, and it is Prāṇa who makes it fall. In Vedic cosmology, the sun evaporates water, which rises and falls again as rain — all this is movement of Prāṇa.
The creatures (prajāḥ) are “yours” — they belong to Prāṇa. All forms of life depend on him. When there is abundance, they are ānanda-rūpāḥ — full of bliss, of well-being.
Kāma — desire. Creatures desire food (anna), and Prāṇa provides. This is a natural cycle: desire → effort → satisfaction. But for the spiritual yogī, desire is transcended. We do not simply seek more anna, but prāṇa free from desires, prāṇa that flows toward liberation.
The subtle teaching: Prāṇa satisfies desires, but is also the means to go beyond desires. In the practice of prāṇāyāma, we learn to control the respiratory desires, which gives us power over all other desires.