Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 43
खमशोभत निर्मेघं शरद्विमलतारकम् ।सत्त्वयुक्तं यथा चित्तं शब्दब्रह्मार्थदर्शनम् ॥ ४३ ॥
kham aśobhata nirmeghaṁśarad-vimala-tārakamsattva-yuktaṁ yathā cittaṁśabda-brahmārtha-darśanam
Free of clouds and filled with clearly visible stars, the autumn sky shone brilliantly, just like the spiritual consciousness of one who has directly experienced the purport of the Vedic scriptures.
The clear and starry autumn sky can also be compared to the pure heart of the devotee. The spiritual nature is always brilliant, clean and blissful, and this spiritual nature, called vaikuṇṭha, immediately satisfies all the desires of the soul. This is the secret of Kṛṣṇa consciousness.