Life
In life, no matter how hard you try, you'll never be perfect, never be good enough at everything. You just have to keep a hard face, let a tear come out once in a while, and keep your head high as you keep falling and getting back up again. Treasure the happiness whenever it appears and keep it in a safe little box to look at when you feel like you've fallen so hard and so many times that you feel like you can't get back up. Let it inspire you to fight because that's all we can do.