"Belief, a psychological state in which an individual holds a proposition or premise to be true".
That trust isn't limited to coaches, however. Teammates, training partners, and friends throughout the years have made the difference between good seasons and unforgettable ones because there is something about not wanting to let these people down that keeps you fighting when you want to give in or give up. Runner's edge posted this picture the other day, and in the caption, they wrote, make sure that that someone IS YOU! It reminded me of what a very wise man (my high school XC coach) once told me: "If you believe 1/10 of 1% of what I believe in you, you are going to surprise yourself (and a lot of other people)...but not me. I know what you are capable of".
Who are you surrounding yourself with?
Who is guiding your training?
Do the people you train with make you a happier/stronger athlete?
Are you your biggest fan and supporter?
So believe in yourself. Surround yourself with training partners, teammates, friends, and coaches who believe in you. Feed off of them when your self doubt creeps in, and believe in yourself so that those goals you set lead you closer and closer to that moment when you can scratch them off your Life To-Do List.