We doubt in others, what is in fact in ourselves. The skeletons in your own closet are the things that scare you the most about others; people who come from a background of lying are suspicious of lying in others and so on and so forth. The most trusting of people, are not people who have never been betrayed or who have never felt pain; but the most trusting of people are those who in themselves do not find those things worthy of that blame. We see the world through the eyes of the condition of our own souls.