सत्त्वं सुखे सञ्जयति रजः कर्मणि भारत | ज्ञानमावृत्य तु तमः प्रमादे सञ्जयत्युत ||१४-९||
sattvaṃ sukhe sañjayati rajaḥ karmaṇi bhārata . jñānamāvṛtya tu tamaḥ pramāde sañjayatyuta ||14-9||
14.9. O descendant of Bharata ! The Sattva fully dominates [the Embodied] in the field of happiness; the Rajas in action; but the Tamas also totally dominates in the field of negligence, by veiling knowledge.
Shri Purohit Swami
14.9 Purity brings happiness, Passion commotion, and Ignorance, which obscures wisdom, leads to a life of failure.
Sri Abhinav Gupta
14.9 See Comment under 14.10
14.9 Sattva mainly attaches one to pleasure. Rajas mainly attaches one to actions. But Tamas, veiling knowledge of true things and being the cause of false knowledge, mainly attaches one to actions which are contrary to those which ought to be done.
The Sattva and other alities evolve from the nature of Prakrti, developed into the form of the body. Owing to this fact that they have evolved out of the nature of Prakrti, they always co-exist in bodies at all time. How, then, can they cause effects which are mutually contrary? He replies:
14.9 O scion of the Bharata dynasty, sattva, sanjayati, attaches one; sukhe, to happiness; rajas (-attaches is understood-) karmani, to action; tu, while; tamas, avrtya, covering up, veiling; jnanam, knowledge, the discrimination produced by sattva; sanjayati, leads pramade, to inadvertence; uta, also. Pramada means non-performance of a duty on hand. When do the alities produce the effects stated above? That is being answered:
14.9 Sattva generates attachment to pleasure, Rajas to action, O Arjuna. But Tamas, veiling knowledge, generates attachment to negligence.
14.9 O scion of the Bharata dynasty, sattva attaches one to happiness, rajas to action, while tamas, covering up knowledge, leads to inadvertence also.
14.9 Sattva attaches to happiness, Rajas to action, O Arjuna, while Tamas verily shrouding knowledge attaches to heedlessness.
14.9 सत्त्वम् purity? सुखे to happiness? सञ्जयति attaches? रजः active force? कर्मणि to action? भारत O Bharata? ज्ञानम् knowledge? आवृत्य shrouding? तु verily? तमः inertia? प्रमादे to heedlessness? सञ्जयति attaches? उत but.Commentary Just as a dark cloud enshrouds the sun? so also Tamas envelops knowledge or the light of the Self. Tamas creates an attachment for heedlessness? that is? ignorance or forgetfulness of duty or the nonperformance of necessary (obligatory) duties.