[johtso]

Acrasia. We severely discount things, positive or negative, that may happen a way off into the future. We struggle to make a "later problem" into a "now problem". The difficulty is that many of life's challenges require action over a period of time.

I also think, speaking from personal experience, our minds have an amazing ability to avoid thinking about things that are difficult or unpleasant. This can mean that we neglect to do things we should be doing (or do the things that cause us harm) not because those things are infact actually okay behaviours, but because we're not even thinking properly about the consequences. We're just doing.