The easiest way to measure your beliefs in the power of this truth is to notice if you are feeling disconnected or drained rather than energized or impassioned about your life.
The flow of life cannot reach you if you are blocked with layers and layers of protection.Or if your attitude is of a fixed position. Or if you are unwilling to start waking up so new energy can flow through you.
As long as you believe you are the producer of your own energy, you will often be tired and weary and feel there is never enough. You do, of course, play a significant role in creating and maintaining your own energy by getting proper rest and nutrition. However, you are not the producer of your own vibrant energy any more than you had to think about breathing today before you took your first breath.