Mandukya Karika 3.41

Sanskrit Verse

उत्सेक उदधेर्यद्वत्कुशाग्रेणैकबिन्दुना ।
मनसो निग्रहस्तद्वद्भवेदपरिखेदतः ॥ ४१ ॥

Transliteration

utseka udadheryadvatkuśāgreṇaikabindunā |
manaso nigrahastadvadbhavedaparikhedataḥ || 41 ||

Translation

The mind can be brought under control only by an unrelenting effort like that which is required to empty an ocean, drop by drop, with the help of a (blade of) Kuśa-grass.