He was a volatile mixture of confidence and vulnerability. He could deliver extended monologues on professional matters, then promptly stop in his tracks to peer inquisitively into his guest's eyes for signs of boredom or mockery, being intelligent enough to be unable fully to believe in his own claims to significance. He might, in a past life, have been a particularly canny and sharp-tongued royal advisor.
Alain de Botton, The Pleasures and Sorrows of Work
confidence, intelligence, professionalism, significance, vulnerability