yathā prakāśhayaty ekaḥ kṛitsnaṁ lokam imaṁ raviḥ
kṣhetraṁ kṣhetrī tathā kṛitsnaṁ prakāśhayati bhārata ||34||

My Understanding : The sun rises every day, and its warmth brings a sense of vitality, releasing healthy dopamine in us.