Patanjali Yoga Sutra 1.22

Sanskrit Sutra

मृदुमध्याधिमात्रत्वात्ततोऽपि विशेषः॥२२॥

Swami Vivekananda's translation

The success of Yogis differs according as the means they adopt are mild, medium, or intense.

Chapter link: Yoga Sutra Chapter 1