That first line is very powerful. Often when we lose ambition, no one knows but us and it can be hard to recognize. I notice when I start to lose my ambition it is because my focus is on things that are not helping me. It is a very subtle shift when this happens but after time I can feel it in my mental state. Being complacent is usually the result. Good poem though. :)
Sometimes the death of ones ambition is merely a redirection towards a new goal. Granted that my be to stay stoned all day and practice mental masturbation but we humans are goal oriented. If we don't have one we manufacture one. Though we may miss that feather it won't define our urge to fly. Fly on poet!