Having a sense of self-importance could be an incredible advantage when dealing with others. However, self-importance to the extreme could be problematic because you will become conceited and stop listening to the market, your loved ones and even, adversaries for feedback.
It’s the writer who thinks he or she is so talented that rather than notice what resonates with readers, continues along a path that attracts little or no attention. It’s the entrepreneur who builds a product without testing if it’s what the market wants, continuing along a route that only leads to failure. It’s the boy or girl in a relationship, whose sense of being the sole object of a partner’s love, makes them act contemptibly.
Conceit’s biggest lie is the illusion of your irreplaceability. Thinking of yourself, product or social value too highly than you ought to think is what can get you seriously whipped. Be humble.