St. Sabbas (439-532)
For sixty years, Sabbas lived in a cave, devoting himself to prayer and manual labor. Every day he wove ten baskets, which he traded for food. He was a superior over 1,000 monks and hermits, and once led a peaceful uprising of 10,000 monks who demanded the end of the persecution of Palestinian bishops by Anastatius I.

Reflections from the Saints

No matter how good food is, if poison is mixed with it, it may cause the death of him who eats it. So it is with conversation. A single bad word, an evil action, an unbecoming joke, is often enough to harm one or more young listeners, and may later cause them to lose God's grace.
– St. John Bosco