Nothing is worthy of your trust. Not even yourself. Trust is taking something for granted. Truth is the process of verifying and re-verifying the status and consistency of something to ensure that it bears the same stability as it did the day prior, and since we live in a universe of unending chaos and change, everything we take for granted as "stable" will undoubtedly be different upon another day. Forgiveness, therefore, is more important than trust because we expect the status of things to fluctuate and the only thing that is really betrayed in a betrayal of trust is our own child-like ignorance or innocence (view it as you will) that anything in this universe was stable enough to be taken for granted in the first place, even friendships or love.
One of the worst flaws in this world is in fact trusting yourself. The mind is weak and will deceive you as it is often times more accepting of what it wants to believe than that which is verifiable as real. It wants to believe that it can trust and love someone who has hurt you repeatedly or that your love can somehow change them rather than accepting that they are as they are. This is one reason that an abused spouse will often return to their abuser.
Another delusion is that of self-control. We will not ever be in full control of ourselves until we have full conscious manipulation of all elements, chemicals, cells, and organs within our own bodies. Anyone with a chemical imbalance (which is fairly common and does undeniably exist within myself) can verify this statement. I also, as a person who has experienced a number of mental breakdowns, can attest to the instability of one's own mind and that to trust in it fully is a terrible error of judgment.
Trust nothing, verify and test everything. Accept that which is as it is currently. That is all one can do...