मृदुमध्याधिमात्रत्वात्ततोऽपि विशेषः ॥

mṛdumadhyādhimātratvāttato'pi viśeṣaḥ

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

In plain words: How fast a yogi succeeds depends on how hard they practice: gently, moderately, or with full intensity.