Lecture I
Once more, you have the leap—the leap, this time, from that in Nature which is not alive to that which is. In the investigation of Nature we shall only find our way aright if we know what the leap is from Kinematics to Mechanics, and again what the leap is from external, inorganic Nature into those realms that are no longer accessible to calculation,—where every attempted calculation breaks asunder and every potential is dissolved away. This second leap will take us from external inorganic Nature into living Nature, and we must realize that calculation ceases where we want to understand what is alive.
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