What is the meaning of ecosophy in the new age of climate change? For the first time in history,civilization is encountering absolute biospherical limits. We have crossed the sustainable yield thresholds of virtually all resources we depend on. The carrying capacity of the land is shrinking worldwide due to climate change. The climate system is destabilizing, the planet is becoming less fertile, and the prospects for food security are dire. A global economic system that must expand merely to remain stable is making things worse, and so does ongoing population growth. Not only are we hitting limits; the walls arc closing in. The old paradigm of the human-nature relationship has entered failure mode. Clearly we must shift to sustainability. This raises the question of what a paradigm of sustainability should involve. Some philosophers contend that repairing the human -nature involvement means we must ease up on scientific scrutiny, overcome technological manipulation, abandon secular conceptions of nature, and return to ancient holistic spirituality. I suspect that ecological intelligence or ecosophy in the age of climate change must aim for a civilization of hard science and high technology, and argue that this soaring of rationality is convergent with ancient holistic spirituality.