no because all criticism is mean
I think so, yes, although not 100% of the time. If the criticism is also constructive and helps you to look at things in a different way and a way you didn't think of before. Constructive or honest criticism should also be unbiased and / or represent what most people would think about the situation. If emotions are heavily involved, it can make things more difficult and make the answer you need less clear...
Yes, but the way in which it is delivered is very important.
For criticism to be honest, we should detach. Detach from all negative feelings and keep only genuine care and tenderness. This, is the hard part about criticism. Yes, it can be such an honest criticism. It only needs effort and focus on our good, pure self.
yes dear an example is going over a test or quiz with a child, a father must build up the success but also gently criticize failure, it is a fine line a parent must walk