Sāṃkhya Kārikā verse 13

sattvaṃ laghu prakāśakam-iṣṭam-upaṣṭaṃbhakaṃ calaṃ ca rajaḥ |
guru varaṇakam-eva tamaḥ pradīpavat-ca-arthataḥ vṛttiḥ ||

sattva - claritylaghu - lightnessprakāśa - brightnesscala - agitation. disturbed, unsteadyrajas - excitingguru - teachereva - thustamas - obscuringarthatā - objectsvṛtti - fluctuation; modification; turned; set in motion, course of action, behaviour, movement; activity, function; profession