Verse
यत्तु कृत्स्नवदेकस्मिन् कार्ये सक्तमहैतुकम् ।अतत्त्वार्थवदल्पं च तत्तामसमुदाहृतम् ॥
The tamasic knowledge is a small and narrow way of looking at things which has no eye for the real nature of the world; it clings to one movement or one routine as if it were the whole (without foresight or comprehending intelligence).
Gītā 18·22