The final part of the 1990 Mickleton recordings introduces Bohm's concept of necessity, from Latin meaning 'don't yield.' When two absolute necessities clash (as in Israeli/Arab conflict), negotiation fails because neither side can turn aside. The solution isn't compromise but questioning whether either necessity is actually absolute. When that attachment releases, 'the energy locked up becomes available for intelligence, friendship, for fellowship.' Bohm introduces proprioception of thought: just as the body perceives its own movement, thought needs to perceive its own operation. He describes a woman who had a stroke and began hitting herself; her motor nerves worked but sensory feedback had broken down. Thought without proprioception operates similarly: creating problems, then treating them as external. On urgency: even solving environmental problems only buys time. 'If you buy time and don't use that time, what's the point?' Both practical action and getting to the root must proceed simultaneously.