No doubt that your strength, stamina and agility will improve by doing Muay Thai. Your life might also change (for the better of course) by doing Muay Thai.
People who practice martial arts tend to have better self discipline and they will do the right thing when no one is watching. We don't do things "for show". We do what's needed and we do what's right.
We are trained to remain calm in every situation. In order to think wisely and to make the right decision, we must stay calm in every situation to have a clear mindset.
We don't give up easily. In fact we never give up. Even at times during training when we are breathless, we are still standing strong awaiting for any challenges. We don't stop when we are tired. That is not our practice. We only stop when we are done.
We aim before we attack. Decisively we will jump straight in without hesitation when we sees an opportunity. We observe and we think before we make a move.
All these practices are actually applicable to our daily life. By doing Muay Thai, our mental will become stronger and we will resolve all obstacles in life with a calm mindset.