If any man is able to convince me and show me that I do not think or act right, I will gladly change; for I seek the truth, by which no man was ever injured. But he is injured who abides in his error and ignorance.
 Marcus Aurelius, Meditations (c. 170 - 180). copy citation

add
Author Marcus Aurelius
Source Meditations
Topic ignorance change
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

“Something like this let thy behavior be in all the other parts of life; let us overlook many things in those who are like antagonists in the gymnasium. For it is in our power, as I said, to get out of the way, and to have no suspicion nor hatred. 21. If any man is able to convince me and show me that I do not think or act right, I will gladly change; for I seek the truth, by which no man was ever injured. But he is injured who abides in his error and ignorance. 22. I do my duty: other things trouble me not; for they are either things without life, or things without reason, or things that have rambled and know not the way. 23. As to the animals which have no reason, and generally all things and objects, do thou, since thou hast reason and they have none, make use of them with a generous and liberal spirit.” source