The mind never ceases to relax and quite frankly, it's quite tiring to deal with at times. 

Like, when you just want to do something without dealing with your mind practically, coming up with highly possible outcomes, yet it has around 20% of a possibility of actually happening, but our mind just always seem to get the better of us.

And it usually, results to us regretting not taking that chance.

Not to mention, the "What if?" thoughts that follow shortly after, and always seem to haunt us later in our lives.