Marcus Epictetus

“Stoic virtues are sometimes referred to as the four cardinal virtues: Practical wisdom (prudence) Moderation (temperance) Courage (fortitude) Integrity (justice) However, each of them individually is not considered a virtue. They may be thought of as traits or dispositions that strengthen and ennoble humankind but must be used together so one does not override the others. The Stoics sought after ethical notions and solid principles. They came up with eight principles to form the foundation for living a good life[VM10]. These principles have been used by people from all walks of life and can help you achieve your goals. Nature is rational. Illness, poverty, and death are not evil; they are natural. A life following rational nature is virtuous. Passion is irrational (apatheia). Wisdom is the root of all virtue. The universe is governed by a law of reason. Pleasure is neither good nor bad. Virtue should be sought as a matter of duty, not for pleasure.”
― Marcus Epictetus, Live a Stoic Life: Using the Ancient Art of Stoicism to Live a Modern Life, Become Tougher, Calmer and More Resilient - Daily Stoic Challenges, Stoicism ... and Stoic Journal

“Stoics hold daily court with themselves. Self-examination and reviewing your day will make you a better person day-by-day. You need to sit down and place your case in your court; be the judge and jury to try and ensure not to repeat your mistakes.”
― Marcus Epictetus, How to Practice Stoicism: Lead the stoic way of life to Master the Art of Living, Emotional Resilience & Perseverance - Make your everyday Modern life ... & Positive