"You are the best judge for yourself" and "Nemo Judex in Causa" (No one should be a judge in his own case) are two maxims that stand in contradiction to each other and none is wrong per se. Reconciliation of these two maxims is paramount and it forms a key to a safe and happy life.

We are responsible for our actions and liable to face the consequences also since we set our own benchmarks and do what we feel is right to the extent of that benchmark.