1. The only good is knowledge and the only evil is ignorance.
2. Remember what is unbecoming to do is also unbecoming to speak of.
3. Remember that there is nothing stable in human affairs; therefore avoid undue elation in prosperity, or undue depression in adversity.
4. I do nothing but go about persuading you all, old and young alike, not to take thought for your persons or your properties, but and chiefly to care about the greatest improvement of the soul.
Socrates , Greek philosopher 469 BC – 399 BC