Should not become an end in itself. The passion and drive to achieve success or fulfil a dream should cross paths with life and not be on a path of its own. Its this life that has given the opportunity to do and achieve and deserves to be well lived. Life would never give you the elbow room or unfold possibilities if it were to become the cause of self harm thus wounding life. If the underlying challenges and threats start coming in the way of living life rather than giving life a meaning, is when your emphasis is shifted from means to the end.
One foregoes the present living for a better future but the dark journey never ends in the clout of aspirations.