Grand Marathon

Perform action, O Arjuna, being steadfast in yoga, abandoning attachment and remaining balanced in success and failure. Evenness of mind is called yoga. Bhagavad Gita II.48
Man, in his eagerness for the desired result of actions, is intensely attached to the actions themselves. Even if it is success and even if i am happy for the moment, it is in the shadow of a terribly oppressive fear that it may not last; and the success is eclipsed by fear of loss. Happy is the man who has a balanced mind; balanced in success and failure. To him success is not success; it is duty discharged. To him failure is not failure; for even that is duty discharged. He has done what had to be done the appropriate action in the right spirit. Duty discharged is perennial success. And it belongs to God, not him. Swami Venkatesananda
In detachment lies the wisdom of uncertainty... in the wisdom of uncertainty lies the freedom from our past, from the known, which is the prison of past conditioning. And in our willingness to step into the unknown, the field of all possibilities, we surrender ourselves to the creative mind that orchestrates the dance of the universe. Deepak Chopra