random thinkings

Always wondering why my major finally turns out to be Decision Making Support, since i oftenly made bad decisions, although everytime i promised that i won't make the same wrong thing next time~

I find a theory named financial behavior, which explains that why people always behavior irrationally rather than rationally when making options. In my opinion, this theory maybe want to show that people's heart works faster than brain, so always when a person is going to make a decision, always in the way following his/her heart directly. So he/she will not hold on to ask his/her brain to make so many calculations.~~~The optimization theory seems to be useless here.

I don't like the feeling to intorduce my major without enough confidence, and also i want to get through this puzzles. Using heart or using brain, it is totoally a complex problem, and my question is how the two manners: buttom-up and up-down, can merge?