Udakañhi nayanti nettikā;
usukārā namayanti tejanaṃ;
dāruṃ namayanti tacchakā;
attānaṃ damayanti paṇḍitā.
fletchers straighten the arrow shaft;
carpenters shape the wood;
the wise control themselves.
Dhammapada 6.80
The Dhammapada: The Buddha’s Path of Wisdom,
translated from the Pali by Acharya Buddharakkhita