It started interesting, but I stopped listening after 30 minutes. I couldn't get past the discussion following the Hume quote. The quote was: Reason is the slave of the passions, which mr Goff didn't think was the case.  In the discussion afterward, the meaning of passion was simply converted into pleasure, and the meaning of reason was converted into "goals". I think both missed the mark there. On the example of counting grass leaves, I think mr Goff is off. I think the rightful interpretation of Hume is that: you can discuss all you want about whether counting grass leaves all day is pointless or not, and it can be even clear to you that its has little to no added value. If it turns out that you feel the need to do so (if thats one of your driving 'passions'), you will be in the field counting grass. Its not about whether it has a purpose or not, its the opposite way around: if you have your mind set to do this, from whatever thing that caused you to get in this place, you will find reasons to do it.