In the talk Jonathan Lear gave he said guilt and anxiety became substitutes for gratitude. I think I'm getting where he was going. Radical hope was about hope in a radically changed world, where nothing was left of what was before, leaving just hope. Then radical gratitude would be about gratitude in the same sense, in a world utterly changed from what one would consider a healthy world, what remains is gratitude for the gift of oneself. What I appreciated about the talk was his openness to unknowing, and his working out the concept of living in the collapsing world in which I imagine (in hindsight) he knew his own time was short.

In the talk he said: I want to say that profound gratitude leads by the very force of its own thinking to a condition that I want to call radical gratitude, that is, a condition in which we necessarily lack the concepts to fill in what we mean. 

And he mentions a certain philosopher and catcher for the New York Yankees who said, When you come to a fork in the road, take it. Jonathan said, We need to take the fork.