Nyaya - The ceasing of the impulse of a Discharged arrow.

इषुवेगक्षयन्यायः

Just as an arrow discharged from a bow flies on and on, till it pierces the object aimed at, when it stops, so a worthy man toils day and night, and stops not, unless and until he obtains his heart's desire, when he puts his tools aside and joyfully takes rest.