"Ruminating" is generally defined as thinking a lot about bad/negative things from the past. Anyone who has paid any attention to Buffett or Munger will tell y

"Ruminating" is generally defined as thinking a lot about bad/negative things from the past. Anyone who has paid any attention to Buffett or Munger will tell you there is no indication they do anything like "ruminate". They appear to think a lot and analyze things, but it's almost all forward looking. And they seem to be very happy. Munger even had a small child die of cancer and said something to the effect of "at some point you just have to dust yourself off and keep moving forward".