We see and feel and know imperfectly very few things in the few years that we live, and all the knowledge and all the experience of all the human race is positive ignorance of the whole, which is infinite.
 Marcus Aurelius, Meditations (c. 170 - 180). copy citation

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Author Marcus Aurelius
Source Meditations
Topic ignorance experience
Date c. 170 - 180
Language English
Reference
Note Translated by George Long
Weblink https://www.gutenberg.org/files/15877/15877-h/15877-h.htm

Context

“But if all things are wisely ordered, how is the world so full of what we call evil, physical and moral? If instead of saying that there is evil in the world, we use the expression which I have used, "what we call evil," we have partly anticipated the emperor's answer. We see and feel and know imperfectly very few things in the few years that we live, and all the knowledge and all the experience of all the human race is positive ignorance of the whole, which is infinite. Now, as our reason teaches us that everything is in some way related to and connected with every other thing, all notion of evil as being in the universe of things is a contradiction; for if the whole comes from and is governed by an intelligent being, it is impossible to conceive anything in it which tends to the evil or destruction of the whole” source