Value your parabatai," he said. "For it is a precious bond. All love is precious. It is why we do what we do. Why do we fight demons? Why are they not fit custodians of this world? What makes us better? It is because they do not build, but destroy. They do not love, but hate only. We are human and fallible, we Shadowhunters. But if we did not have the capability to love, we could not guard humans; we must love to guard them. My parabatai, he loved like few ever could love, with all and everything. I see you are like that too; it burns more brightly in you than the fire of Heaven

Very often people have a very limited way of thinking.

The degree of freedom we enjoy outwardly is a reflection of the degree of love we cultivate inwardly.

A mind is a simulation that simulates itself.

Consciousness of self was an inherent function of matter once it was organized as life, and if that function was enhanced it turned against the organism that bore it, strove to fathom and explain the very phenomenon that produced it, a hope-filled and hopeless striving of life to comprehend itself, as if nature were rummaging to find itself in itself - ultimately to no avail, since nature cannot be reduced to comprehension, nor in the end can life listen to itself.

Conventional wisdom won't provide continual growth.