I take this quote i my own way; Some journeys in life one has to travel alone. Like the struggle to achieve the goals of life. A night before the exam and the preparation for the exam one has to do alone. Quite similarly if someone special leave you alone, you have to bear the pain of that wound alone. There comes several occasions which demands solo performance from you, just to make you even more perfect at the end.
Wonderful quote with wonderful and deep message :)