You know of the disease called sleeping sickness. There also exists a sleeping sickness of the soul. Its most dangerous aspect is that one is unaware of its coming. That is why you have to be careful. As soon as you notice the slightest sign of indifference, the moment you become aware of the loss of a certain seriousness, of longing, of enthusiasm and zest, take it as a warning: your soul suffers if you live superficially.
When you no longer have expectations, the unexpected kindness of others and small acts of consideration become like "sweet manna from heaven." The feeling that rises spontaneously within one's heart at such times is true gratitude. When one is accustomed to kindness, one can lose the feeling of gratitude. One must constantly return oneself to the spiritual starting point of no expectations.
~ from TARIKI: Embracing Despair, Discovering Peace by Hiroyuki Itsuki
We cannot know that we are illuminated by a great light simply by looking up into the sky. But if we lower our heads and look down at our feet, we can clearly see the long, dark shadow that stretches out from us. We know that the darker and blacker that shadow is, the brighter is the light that shines upon us. Thus, we have been told to look at our own dark shadows [within].
~ from TARIKI: Embracing Despair, Discovering Peace by Hiroyuki Itsuki