Honesty: 1. fairness and straightforwardness of conduct
2. adherence to the facts
I think we mistake opinion and belief for honest fact. Humans have large brains and are more cerebral than most animals. But we feel first and think second; emotions are powerful in the game of survival.
So we accept what we feel to be true, often never learning the honest truth. We believe what feels right, or feels better than the facts.
If your life has gone downhill, you will have to face facts before you can make it better. Get your emotional support together first, and the facts will be easier to bear.