Hmm. I've been thinking about this lately, with regards to "feelings of success, achievement..." etc. Especially with relation to fitness...it's actually the opposite, at least for me. The notion that failure is a possibility is exciting in a weird way and drives me to go out and do it. Whatever it is. Running, hiking, and more recently, climbing. Success is great, but the struggle and chances of failure might be greater.For example people play all kinds of computer games (or post on hubski) for the reasons on the internal list. Priorities are probably feelings of success, achievement, smartness for the games. Whereas the feelings of success if we do stuff on the external list are few in the short term and iffy in the long term. Priorities on the second list are also to have a feeling of connection, importance, impact, meaning, etc. We sometimes get that from a hubski post.