another quote

Do you have a quote you live your life by or think of often?

THE SAME OBJECT SHOULD PRODUCE IN SEVERAL MEN’S MINDS DIFFERENT IDEAS at the same time;

Locke, John. John Locke: Complete Essay on Human Understanding, 161

[The capitals are in the original – not yelling! Also the gender specific language.]

How do I know that your experience of reality is the same as my experience of the same “object”?