Guṇa-vibhāga: The Three Modes and the Path Beyond Them
विकुर्वन् क्रियया चाधीरनिवृत्तिश्च चेतसाम् । गात्रास्वास्थ्यं मनो भ्रान्तं रज एतैर्निशामय ॥ १७ ॥
vikurvan kriyayā cā-dhīr anivṛttiś ca cetasām gātrāsvāsthyaṁ mano bhrāntaṁ raja etair niśāmaya
You should discern the mode of passion by its symptoms — the distortion of the intelligence because of too much activity, the inability of the perceiving senses to disentangle themselves from mundane objects, an unhealthy condition of the working physical organs, and the unsteady perplexity of the mind.
This verse lists rajas as seen in agitation and anxiety driven by constant activity, inability to withdraw the mind, bodily imbalance, and a bewildered, restless mind.
In the Uddhava Gita, Krishna teaches Uddhava how to discern the three gunas by their practical symptoms so one can rise beyond them through devotion and steady spiritual practice.
Notice patterns of compulsive busyness, mental overstimulation, anxiety, and health imbalance; then reduce needless activity, cultivate sattvic habits, and anchor the mind in bhakti (hearing and chanting).