Verse 18.39
यदग्रे चानुबन्धे च सुखं मोहनमात्मनः । निद्रालस्यप्रमादोत्थं तत्तामसमुदाहृतम् ॥ १८.३९ ॥
जो सुख भोग काल में तथा परिणाम में भी आत्मा को मोहित करने वाला है —- वह निद्रा, आलस्य और प्रमाद से उत्पन्न तामस कहा गया है ।
That type of pleasure which blinds one to the path leading to true self-harmony and self-realization, both in the beginning as well as in the end, is known as the TAMAS pleasure. This pleasure is derived from drowziness, laziness, carelessness and illusion. Instead of bringing divine happiness to the soul, it deludes the soul and darkness surrounds it.