Trust for you can be trust

How can you trust someone who doesn't trust you or anyone? Trust is something that is difficult to gain. For us to be trusted by someone we should know how to trust others. We always have this problem in finding someone or people whom we can trust, cause now a days it's really hard to trust someone. Come to think of it, we can trust someone but not to the full extent. As time goes by we can give full trust to those we really knows and vise versa.