Verse 40

साधयन्ति समुत्सृज्य युक्तिं ये तान्हठान्विदुः ।भयाद्भयमुपायान्ति क्लेशात्क्लेशं व्रजन्ति ते

In plain words

-- those who, casting the method aside, try to master these are known as men of haṭha, of force: they go from fear to fear, they pass from affliction to affliction.