Shloka 18
शोक-शमन उपदेशः
Instruction on the Pacification of Grief
यथा तु सलिलं राजन् क्रीडार्थमनुसंतरत् । उन्मज्जेच्च निमज्जेच्च किंचित् सत्त्वं नराधिप
yathā tu salilaṃ rājan krīḍārtham anusantarat | unmajjecca nimajjecca kiṃcit sattvaṃ narādhipa ||
大王啊，譬如水中一微小生灵，为嬉戏而游动，时而浮出水面，时而复沉入水底——众生亦然，为境遇与欲念所驱，或暂时显达，旋即又坠入湮没。
विदुर उवाच
Educational Q&A
The verse teaches that rise and fall are natural and recurring, like a creature surfacing and submerging in water; therefore one should not become arrogant in success or despair in decline, but maintain discernment and steadiness.
Vidura addresses the king and uses a vivid simile from nature—movement in water—to counsel him about the unstable, alternating conditions of worldly life and status, framing a moral warning suited to royal decision-making.