You've been embarrassed by your family, who does not understand why you must do this ridiculous thing. You've felt pain and rejection and worthlessness. You've had your soul and your talent and your hope stepped on, and you've cried your share of private tears, and you've kept up a brave face in public more than you'll ever admit. Even when you succeed by your own definition of success, whatever that might be, you will continue to struggle, and you will never leave the struggle behind. Every story and every book is another chance to fail just exactly as much as it is another chance to succeed.
Every day is a challenge, and every day requires courage.
The two are as inseparably linked as breathing in is linked to breathing out. You cannot have one without the other, though you can live a safe life and have neither. Courage is standing at the bottom of the mountain, knowing that the climb is going to hurt like hell and that you might never reach the top, and climbing anyway. I've done my share of falling, and I have the scars to show for it. I still don't know what the view from the top is like.