Integrity:
1. adherence to moral and ethical principles; soundness of moral character; honesty.
2. the state of being whole, entire, or undivided.
When you think about it, the first definition is the evidence of the second.
I trust my brothers with my life and vice versa. How long we’ve known each other isn’t worth much to me. At my age everybody I know at this point I’ve knows for YEARS.