Contrary to what my headline might suggest, this is actually an upbeat message.
Guilt is about what you have done. You did something you feel you should not have done, but you did it anyway. Out of spite, out of impulsivity, out of ignorance. Now you are suffering. You feel bad about it.
Shame is about who you are. You are, in your world, less than you should be. That should may come from religion, comparison with others, comparison with the potential you once were…. Either way, you disappointed yourself, and now you are suffering.
Failure in business/life has no connection to either of these.
Failures, in business/life, are those little solar lights stuck in the ground, on the way to success.