Quote by Baruch Spinoza
"Happiness consists in the power to preserve one's own being; unhappiness consists in diminishing that power."
More from Baruch Spinoza
"He who has a true understanding of things experiences a kind of joy whenever he thinks of anything, hateful though it may be in itself."
"Fear cannot exist where there is hope."
"A free man thinks of nothing less than of death, and his wisdom is a meditation not on death but on life."
"The human body is composed of a great number of parts of diverse nature."