A Syrian slave in the first century BC, Publius Syrus is a fountain of quick, helpful wisdom that you cannot help but recall and apply to your life. “Rivers are easiest to cross at their source.” “Want a great empire? Rule over yourself.” “Divide the fire and you will sooner put it out.”

The best philosophy comes from people who were not “philosophers.” Syrus was a slave and his moral maxims are far better than perhaps the most famous book in this category, those of Duc de la Rochefoucauld. Some favorites: “The mightiest rivers are easy to cross at their source.” “Avarice is the source of its owns sorrows.” And of course, extra-applicable to this list, “Many receive advice, few profit by it.”