There is energy in joy, and there is also energy in frustration. There is energy in peace, and energy in sadness as well. The particular source of the energy is not nearly as important as what you decide to do with it.
If your life has no guiding purpose, all that energy, coming from so many directions, will keep you in a constant state of turmoil. Or, you can harness that energy and let it all move you powerfully toward the fulfillment of your dreams.
Where do you find the energy to move forward? It is all around you, in every situation and occurrence.