When you have some success, the feeling of being an imposter can be real. Who am I fooling? But when you create things that only you — with your unique talents and experience — can do, then you are absolutely not an imposter. You are the ordained. It is your duty to work on things that only you can do.
The only true voyage of discovery would be not to visit strange lands but to possess other eyes, to behold the universe through the eyes of another, of a hundred others.