do no harm

"Here is a guideline to practicing truthfulness.

Bear in mind that the truth is always beneficial,

but that a statement of fact may be either beneficial or harmful.

If there is a chance that a statement will do harm,

it must not be considered a truth in the highest sense.

If you cannot speak sincerely without the risk of inflicting harm,

the best alternative is to remain silent."

-Donald Waters

calligraphy from here