Ideas and philosophies have a shelf-life. They must be kept fresh and renewed or they will spoil. If left unattended, the same ideas and philosophies that once nourished you and helped you grow can poison you and make you sick. Become aware of new ideas that can refresh your way of life and be open to the fact that your old ideas and philosophies can work for you for some time, but when the shelf-life has passed, those ideas and philosophies could also harm you.
It hurts to let go, to say goodbye for the final time and remain distant in your closure, it may even tear your heart out to the point of insanity; but somehow in it all you find the pieces of your worth and you start creating yourself again, and in that journey of transformation you find the essence of what truly matters, inner happiness. It's life, we all fall at some stage but it's up to you, to decide how long you want to stay there.