Ibn Sina

"The greatest wealth is health."

"Whoever is not grateful will not receive increase."

"The human being is distinguished by perception and intellect."

"Knowledge is power."

"The purpose of the physician is to do good, to give medicine to the sick."

"Time is the substance I am made of."

"The breast of a prudent man is the safest coffer."

"Do the difficult things while they are easy and do the great things while they are small."

"There are things that are not yet, but will be."

"The intellect is the noblest of creatures."

"Sleep and waking are both influenced by the nature of our temperament."

"The human soul must have objects of love, some food upon which to feed."

"Nature is not cruel, it is we who are cruel to nature."

"The true healer is truth and righteousness."

"Life is a tree; we must choose our branches carefully."

"Every desire has an object, and every action has a purpose."

"Patience is the mark of the wise."

"The soul is immortal and eternal."

"Science is the knowledge of things by their causes."

"To understand divine things through reason is to understand the purpose of creation."

"Fear is pain arising from the anticipation of evil."

"The perfection of the intellect is a human perfection."

"Medicine is the science by which we learn the various states of the human body."

"In the arena of human life, the honors and rewards fall to those who show their good qualities in action."

"The good of the human being is an activity of the soul in accordance with virtue."

"A man cannot be called brave if he is afraid of life."

"Beauty is the harmony of the parts."

"The essence of life is struggle."

"Understanding is the reward of faith."

"Peace is the fruit of activity, not of passivity."