असंयतात्मना योगो दुष्प्राप इति मे मतिः। वश्यात्मना तु यतता शक्योऽवाप्तुमुपायतः॥
asaṃyatātmanā yogo duṣprāpa iti me matiḥ vaśyātmanā tu yatatā śakyo'vāptumupāyataḥ
Meaning
It is not possible to attain Self-Realization unless one knows how to control oneself; however, for one who, striving by the proper means, learns such control, it is possible.
English translation by Shri Purohit Swami (1935), public domain. Sanskrit text in the public domain. About Duvidha