This is a great article... "Seneca wrote a number of tragedies that directly inspired William Shakespeare, but was also one of the main exponents of the Stoic school of philosophy, which has made a surprising comeback in recent years. Stoicism teaches us that the highest good in life is the pursuit of the four cardinal virtues of practical wisdom, temperance, justice and courage – because they are the only things that always do us good and can never be used for ill. It also tells us that the key to a serene life is the realization that some things are under our control and others are not: under our control are our values, our judgments, and the actions we choose to perform. Everything else lies outside of our control, and we should focus our attention and efforts only on the first category."

This is a great article... "Seneca wrote a number of tragedies that directly inspired William Shakespeare, but was also one of the main exponents of the Stoic school of philosophy, which has made a surprising comeback in recent years. Stoicism teaches us that the highest good in life is the pursuit of the four cardinal virtues of practical wisdom, temperance, justice and courage – because they are the only things that always do us good and can never be used for ill. It also tells us that the key to a serene life is the realization that some things are under our control and others are not: under our control are our values, our judgments, and the actions we choose to perform. Everything else lies outside of our control, and we should focus our attention and efforts only on the first category." - What makes a life worth living? Massimo Pigliucci introduces Seneca’s classic letter of Stoic philosophy, ‘On the Happy Life’