Failure is only a message from your actions to you telling you to think different. In many ways failure is the ruler to successful mindset. There can truly be no winning without failing. The best way to think of failure is as the other side of the coin. There are many champions that met with temporary defeat or failure before striking success. So in many ways if failure teaches us anything we learn that effort patience and discipline is all reasonable measures of success. So do not quit when something gets too hard or experiencing a lack of immediate success. It's imperative to keep moving through.
