Never insult your work place superiors, your charities benefactors, or paying clients. Do not intimidate or have them think that you are belittling them. Do not create enemies. Egotism on your part can allow the pride and vanity of others with low self esteem or confidence to quickly target you. Your boss could fire you or just make it so difficult to continue working that you quit, a benefactor could withdraw their support for your charity, and the paying client could stop using your services and influence others to do the same.