Just as one spoils the stomach by overfeeding and thereby impairs the whole body, so can one overload and choke the mind by giving it too much nourishment. For the more one reads the fewer are the traces left of what one has read; the mind is like a tablet that has been written over and over. Hence it is impossible to reflect; and it is only by reflection that one can assimilate what one has read. If one reads straight ahead without pondering over it later, what has been read does not take root, but is for the most part lost.
Down the winding cavern we groped our tedious way, till a void boundless as the nether sky appeared beneath us, and we held by the roots of trees and hung over this immensity; but I said: if you please we will commit ourselves to this void and see whether providence is here also.
You are good when you strive to give of yourself. Yet you are not evil when you seek gain for yourself. For when you strive for gain you are but a root that clings to the earth and sucks at her breast. Surely the fruit cannot say to the root, 'Be like me, ripe and full and ever giving of your abundance.' For to the fruit giving is a need as receiving is a need to the root.
While all other things are uncertain, evanescent, and ephemeral, virtue alone is fixed with deep roots; it can neither be overthrown by any violence or moved from its place.
But we wish to give the Jews a Homeland. Not by dragging them ruthlessly out of their sustaining soil, but rather by removing them carefully, roots and all, to a better terrain.
For even as love crowns you so shall he crucify you. Even as he is for your growth so is he for your pruning. Even as he ascends to your height and caresses your tenderest branches that quiver in the sun, so shall he descend to your roots and shake them in their clinging to the earth.
How do the stems connect to the roots?' 'Where is the mist coming from?' 'Why does one tree seem darker than another?' These questions are implicitly asked and answered in the process of sketching.
The main ingredient of the first quantum revolution, wave-particle duality, has led to inventions such as the transistor and the laser that are at the root of the information society.