Many sufferers of depression will resonate with this statement. Often one of the worst things about depression is the complete lack of energy and zeal. I believe that this is the reason why many interventions or attempts at lifting depression, personally or professionally, are unsuccessful.
It doesn’t matter how well designed or insightful the intervention may be. It doesn’t matter how many times it has worked in the past, or for others. If we cannot muster the energy to try it, then it will never work.