Thought are the our strength. Our mind work according to our thought, but sometimes our mind thinks a lot of things related to our past and our future.
As you stated that our mind is capable to more than 50,ooo in a day.
But the only thing a noticed that our mind have very little bit capabily to think about current moment and most of the time it's think about either past or about future.
But if our mind started think about positive things at that time we feel happy and if our mind started think about negative prospective of our life at that moment we feel bad.
Any way this is God gifted capability to collect different thoughts in our mind.
and this is only thing that differentiate between a animal and a human.