We may enjoy an experience of God that is so delightful that we may think all our troubles are over and we have at last completed the journey. Then after a few hours or a few days we find ourselves on the spiral staircase again and cannot even remember the pleasures of that transient experience of divine union. The whole purpose of this alternation is to bring the soul to the total transformation of love.
~ from FRUITS AND GIFTS OF THE SPIRIT by Thomas Keating
If your still alive your mission on earth is not yet complete. People are happiest when they are so completely engrossed in an activity that they lose track of time and go into what is called a flow state. For this to occur, the activity must be reasonably challenging, neither too easy or too hard. It must be something that is of value to others, and it must be something that you love, that you can be passionate about. Your passion for your work will get you out of bed and into the workplace' even when you don't really feel like it, even when you are discouraged about your progress.