Dhammapada verses 143, 144 and 145

143. Only rarely is there a man in this world who, restrained by modesty, avoids reproach, as a thoroughbred horse avoids the whip.

144. Like a thoroughbred horse touched by the whip, be strenuous, be filled with spiritual yearning. By faith and moral purity, by effort and meditation, by investigation of the truth, by being rich in knowledge and virtue, and by being mindful, destroy this unlimited suffering.

145. Irrigators regulate the waters, fletchers straighten arrow shafts, carpenters shape wood, and the good control themselves.

– Dhammapada X – Dandavagga: Violence 143, 144 and 145