Plato

"Honesty is the foundation upon which all other virtues rest."

"The ear is the organ of a timid and fearful soul."

"Books are a quietest and most constant of friends."

"An honest answer is like a kiss on the lips."

"Wonder is pleasure married with curiosity."

"Work as if you were to live a hundred years; pray as if you were to die tomorrow."

"Absolute virtue is impossible; relative virtue is all we can know and live by."

"A good decision is based on knowledge and not on numbers."

"Wealth consists not in having great possessions, but in having few wants and contented mind."

"The measure of intelligence is the ability to change."

"Self-conquest is greater than the conquest of nations."

"The empty vessel makes the loudest sound."

"Good people do not need laws to tell them to act responsibly, while bad people will find a way around the laws."

"The measure of a person is what they do with power."

"Ignorance is the root of all evil, and knowledge is the cure."

"We are dying from overthinking. We are slowly killing ourselves by drowning in our thoughts."

"The greatest wealth is health."

"Wonder is the beginning of wisdom."

"Every heart sings a song, incomplete, until another heart whispers back."

"No one is more hated than he who speaks the truth."

"The first and greatest victory is to conquer yourself."

"Astronomy compels the soul to look upwards and leads us from this world to another."

"The direction in which education starts a man will determine his future in life."

"In every conceivable manner, the family is link to our past, bridge to our future, and bond to one another."

"Courage is knowing what not to fear."

"The prison-house is the world."

"He who is not a friend to himself cannot be a friend to anyone."

"Truth is the beginning of every good thing."

"I have understood that the task is not so much to see what no one yet has seen, but to think what nobody yet has thought."

"The soul which has conquered itself is the mightiest warrior."