True CHARACTER is revealed in the choices a human being makes under pressure – the greater the pressure, the deeper the revelation, the truer the choice to the character’s essential nature.
Beneath the surface of characterization, regardless of appearances, who is this person? At the heart of his humanity, what will we find? Is he loving or cruel? Generous or selfish? Strong or weak? Truthful or a liar? Courageous or cowardly? The only way to know the truth is to witness him make choices under pressure to take one action or another in the pursuit of his desire. As he chooses, he is.
Pressure is essential. Choices made when nothing is at risk mean little. If a character chooses to tell the truth in a situation where telling a lie would gain him nothing, the choice is trivial, the moment expresses nothing. But if the same character insists on telling the truth when a lie would save his life, then we sense that honesty is at the core of his nature.