“Persons appear to us according to the light we throw upon them from our own minds.”
– Laura Ingalls Wilder, The First Four Years

It is true whether you put the best interpretation on people (and their actions) that you can, or the worst interpretation.  In either case, you tell people more about yourself than about others, revealing the light (or darkness) of your own mind.

Charity…
Beareth all things,
believeth all things,
hopeth all things,
endureth all things.
I Corinthians 13:7