But that which clings to one single effect as if it were the whole, without reason, without any foundation in Truth, and is trivial—that is declared to be Tamasic.

Swami Sivananda

But that (knowledge) is said to be born of tamas which is confined to one form as if it were all, which is irrational, unconcerned with truth, and trivial.

Swami Gambirananda

Follows the commentary of Shankara (Advaita).

But that knowledge is declared to be Tamasika which clings to one single act as if it were the whole, which is not based on reason, and which is false and insignificant.

Swami Adidevananda

Follows the commentary of Ramanuja (Vishishtadvaita).

That [instrument-of-knowledge], because of which one, not realizing the whole, gets indulged without reason in a particular activity, and which is unconcerned with the real nature of things and is insignificant—that is declared to be of the Tamas (Strand).

Dr. S. Sankaranarayan

Follows the commentary of Abhinavagupta (Kashmir Shaivism).

But that which clings blindly to one idea as if it were all, without logic, truth, or insight, has its origin in darkness.

Shri Purohit Swami

किंतु जो (ज्ञान) एक कार्यरूप शरीरमें ही सम्पूर्णके तरह आसक्त है तथा जो युक्तिरहित, वास्तविक ज्ञानसे रहित और तुच्छ है, वह तामस कहा गया है।

Swami Ramsukhdas

और जिस ज्ञान के द्वारा मनुष्य एक कार्य (शरीर) में ही आसक्त हो जाता है, मानो वह (कार्य ही) पूर्ण वस्तु हो तथा जो (ज्ञान) हेतुरहित (अयुक्तिक), तत्त्वार्थ से रहित तथा संकुचित (अल्प) है, वह (ज्ञान) तामस है।

Swami Tejomayananda