Negative thoughts are automatic and learned quickly, while positive thoughts require practice.

“Negative thoughts unfortunately that reside in our reptile brain are automatic so that hyper response I mean danger type of situation when we evolved right is responsible for our survival so we learn the negative thoughts very well I'm in danger I have to run I have to get on top of this tree the lion might come whatever so only 50 million years ago when we developed the frontal cortex more uh positive thoughts came into the picture and they're very helpful for all the reasons you're mentioning but they're not automatic like the negative ones are”