...In the first instance we should say that the person suffering a severe blow on the head loses both consciousness and what I am calling reactivity, and they are therefore different things.\n\n This distinction is also important in normal everday life. We are constantly reacting to things without being conscious of them at the time. Sitting against a tree, I am always reacting to the tree and to the ground and to my own posture, since if I wish to walk, I will quite unconsciously stand up from the ground to do so.\n\n Immersed in the ideas of this first chapter, I am rarely conscious even of where I am. In writing, I am reacting to a pencil in my hand since I hold on to it, and am reacting to my writing pad since I hold it on my knees, and to its lines since I write upon them, but I am only conscious of what I am trying to say and whther or not I am being clear to you.\n\n If a bird bursts up from the copse nearby and flies crying to the horizon, I may turn and watch it and hear it, and then turn back to this page without being conscious that I have done so.\n\n In other words, reactivity covers all stimuli my behavior takes account of in any way, while consciousness is something quite distinct and a far less ubiquitous phenomenon. We are conscious of what we are reacting to only from time to time. And whereas reactivity can be definded behaviorally and neuologically, consciousness at the present state of knowledge cannot.

• consciousness
• reactivity
• suffering
• life
• time
• will
• knowledge
• behavior
• ideas
• writing
• other