No one should be judge in his own cause.

You cannot assess a matter fairly when the outcome affects you, and the failure is not dishonesty. It is that the mind quietly weights the evidence before you ever see it. The more confident you feel about your own case, the less that confidence tells you, which is why every profession that takes fairness seriously brings in someone from outside.

Where a decision favours you, get one person who has nothing at stake to look at it. Ask them what they would think if they did not know you. Do this before you commit, rather than after, when their view can only be a verdict.