As far as I know, it is a fact that our decisions are ultimately driven by emotions. We use rational justifications to justify doing/not doing a thing, but those justifications are really predicated by an emotional decision that is pushing us in 1 direction or the other.

I also know that emotions are fickle and will change from moment to moment, and day to day. So then how can I trust any decision I make, if I know soon my emotions will change and I will want to make the opposite decision instead? This inevitably leads to me regretting and doubting any decision I make.

Take for example buy a cheap used car vs a nice new car. Which option I should go with is going to match whatever emotional state I'm in, and I can make "rational" justifications for both purchases. Numerous times I've made a decision, then when I was about to finalize it, my emotions happened to be in the other direction which caused me to justify the opposite. Therefore I've been in limbo for weeks, unable to decide and regretting every step I take in either direction.

How do you reach internal emotional congruency when every side of a decision has completely valid justifications. It is paralyzing and impossible to choose. The advice "Just pick one and go for it" doesn't work for me. Any advice or help would be appreciated. Thanks.