duhkhaṃ hi yo veda yato nidānaṃ kāmeṣu jantu sa kathaṃ rameta |
upadhiṃ hi loke śalyam iti matvā tasyaiva dhīro vinayāya śikṣet |2,20|
20. They who know that this (i.e., desire) is the origin of sorrow, how can they delight in pleasures? Having learnt that this is the cause of pain in the world, they acquire steadfastness to help to control themselves.