Friendships, like marriages, are dependent on avoiding the unforgivable.
Integrity is not a conditional word. It doesn't blow in the wind or change with the weather. It is your inner image of yourself, and if you look in there and see a man who won't cheat, then you know he never will.
In many ways life is less random than we think. In your past and mine, there have been times when we have, on some lonely trail, constructed a device aimed into our future. Perhaps nothing ever comes along to trigger it. We live through the safe years. But, for some people, something moves on the half-forgotten path, and something arches out of the past and explodes in the here and now.