6:36
असंयतात्मना योगो दुष्प्राप इति मे मतिः ।
वश्यात्मना तु यतता शक्योऽवाप्तुमुपायतः ॥६- ३६॥
asaMyataatmanaa yogo duShpraapa iti me matiH ।
washyaatmanaa tu yatataa shakyo'waaptumupaayataH ॥६- ३६॥
Source: Automatic ITRANS Transliteration
For those without self-control, Yoga is very difficult in my opinion.
Practicing self-control, though, it is possible to achieve a solution.
Source: Milind S. Pandit
In My opinion, yoga is difficult for the one whose mind is not subdued. However, yoga is attainable by the person of subdued mind by striving through proper means.
For one whose mind is unbridled, self-realization is difficult work. But he whose mind is controlled and who strives by right means is assured of success. That is My opinion.
Source: Bhagavad Gita As It Is