People tend to trust you as the come to know you. Then they tend to untrust you as you abuse their trust. This is true in marriage, in church leadership, in business, etc.
The erosion of your trust equity can happen overnight, such as when the local news breaks the story of a moral failure. But more often than not, our trust equity erodes in bits and pieces as we repeat our mistakes without learning from them.
The harsh truth is that without trust, we have no influence or intimacy, and once trust is lost, it may take a long time to earn it back.
We walk into every new relationship with a certain amount of trust equity by default. What we do with it makes all the difference. Invest wisely!