"Woke up in the morning. Outside the window is a dull landscape of a small city where people live like moles in burrows. An ordinary day, everything as always. But the ghost of doubt still loomed in consciousness, not wanting to disappear with the first cry of the roosters. For the sake of what I wandered and suffered for six months: starved in Papua New Guinea, slept on the sidewalk in the company of Indonesian homeless people, shaking from cold at night in China? After all, I will not be awarded a chocolate medal and a material allowance as for an international tramp will not be appointed. Who makes me do this? Maybe my own stupidity? But no, this is her sister — conscience. And I got back to work."
January 1, 1970
https://en.wikiquote.org/wiki/Viktor_Pinchuk