Trust is an emotional act.
Emotionally, it is where you expose your weakness to people, but believing they will not take advantage of your openness.
We tend to trust the person when we experience the trustworthiness of the other person.. and also because they have faith in human nature.
"I'm not upset that you lied to me, I'm upset that from now on I can't trust you"- Friedrich Nietzche
"Trust is like a vase. Once it's broken, though you can fix it, the vase will never look the same again"
"I know God will not give me anything which O can't handle. I just wish HE didn't trust me much"- Mother Teresa of Calcutta
Trust is something we build so that people trust us.
Never break a trust, because it will be gone.