"I wasn't really raised to be the type of person to have doubts"

In this quote, John Malkovich is revealing that he was brought up in such a way that instilled self-confidence and certainty in him. He recommends that doubt was not a typical emotion in his training which he was taught to be a strong and definitive individual. This could be analyzed as a reflection of his childhood, where he was most likely encouraged to trust his instincts and not second-guess himself. It could likewise recommend that he was raised in an environment where doubt was seen as a weak point, and for that reason, he learned to suppress it. In general, this quote highlights the effect of one's upbringing on their personality and frame of mind.