And the last key, the eight, is a trim sensor.
The formula is: try, fail, think and try again: Winners never fail, we just find ways not to, but we don't fail.
You fail when you stop trying. So, try, fail, think and try again. To achieve evolution we start with disappointment: if there is no lesson to learn; therefore, there was no evolution.
Remember: “There are no failures, only learning”