Some people may be able to fool you for a while, but it's at times of stress and difficulty that a person's true colours shine through.
The last fortnight has been one of the toughest that Formula 1 has experienced for some time. Indeed, most people were still feeling incredibly raw arriving in Russia as the reality of Jules Bianchi's condition sunk in.
Many at Sochi were trying to keep the emotions at bay but, away from the public glare in the paddock, and hidden behind closed doors or garage screens, true feelings came to the fore. It's not often that some of F1's supposedly most hardened men are reduced to tears.