How to see through a person's inner thoughts? Don't listen to what they say, but observe what they do. Words can embellish, explain, or conceal, but actions are made under current real conditions and are harder to fake. Don't repeatedly ask "Why is he like this," and don't be led astray by various explanations; just focus on what he actually does, especially long-term repeated behaviors. Judge reality by actions, and then make your choices based on that reality.