Tamas

Tamas is the third of the three guṇas that make up prakṛti. It represents inertia, darkness, and stagnation. It manifests as laziness, apathy, confusion, and excessive sleep. It is not 'bad' in itself — without tamas there would be no restorative sleep or material stability. The problem is its excess. The direct antidote is rajas (activity), then sattva (clarity).