That eternal region of the grandfather which originates from Vedic penances, and which is concealed in a cave, can only be acquired by self-control.
यच्च पैतामहं स्थानं ब्रह्मराशिसमुद्भवम्। गुहायां पिहितं नित्यं तद् दमेनाभिगम्यते॥