करत करत अभ्यास के, जड़मति होत सुजान
रसरी आवत जात ते, सिल पर परत निसान

 translation:

with honest efforts, persistence and hard work, the biggest of fools and the most simple headed of persons can become intelligent,

just as by repeatedly passing to and fro over a stone, even a rope leaves an indelible mark on the stone.