People restrain their senses for taking care of their virtue and heaven. There is no penance higher than abstention from food in control over the senses as also in the acquisition of virtue.
इन्द्रियाणीह रक्षन्ति स्वर्गधर्माभिगुप्तये। तस्मादर्थे च धर्मे च तपो नानशनात् परम्॥