In life, when one gets to the point of a deeper sense of understanding about himself and his purpose, he least explains himself much to people who fail to understand him and his purpose. That must not be interpreted as neither pride nor an uncaring attitude but a great respect for purposefulness
Although others can devalue who we are and what we do it is entirely up to us, whether we accept or reject it. Whenever we disagree with the offered opinion we can thank for it and then move on. There is no need to prove at all that we have a different perception of ourselves from what we are being offered.