Ch. 3 Yoga of One’s Own Dharma (Part 8)
Human nature is composed of the triad of guṇas – sattva, rajas, and tamas. It is true of the universe also. A man’s inner nature influences his outward behaviour and vice-versa. The essence of graha-atigraha mentioned in the Bṛhadāraṇyaka-upaniṣad is this mutual impulse.
tattvavit-tu mahābāho guṇa-karma-vibhāgayoḥ ।
guṇā guṇeṣu vartanta iti mattvā na sajjate ॥ (BG 3.28)