We will never regret if all the things happen as we envisaged. Regret will come only when there is a difference between what we expected and what happened. Any decision we should take in such a way that we need not regret our decision afterwards. If somebody asks for something which is not practical our answer should be such that the person who asked initially should regret his question. When we take up a task we should work in such a way that no mistake will take place and in the end, we should not feel regret for our actions.