There comes a point in every spiritual student's life when they begin to realise that there just isn't enough time, and that even with all the will in the world they're only going to make minor headway along the path they've chosen, or rather, has chosen them. It is at that point of understanding the basic irony at the heart of all nontrivial work: that failure is built in and absolutely unavoidable, that the work, if they chose to continue, becomes a joy: worry-free.