In 1997 on Cho Oyu, and again in 1999 on Everest, I saw the indefatigable strength of Ukrainian climbers. Today, we see the same in the Ukrainian people, fighting for their nation against Putin's aggression.

Thoughts about our mountains while sitting on a bristlecone high in the Colorado Rockies.

When things seem hopeless - as they often do now - it is time more than ever to embrace hope, embrace the risk it entails, and gather its energy to drive us forward into the unknown.

From Swami Vivekananda to philosopher Ken Wilber, physicist Alan Lightman to rebel environmentalist Ed Abbey, today's "Thursday Thought" about contemplating Oneness in a world that insists on duality.