Mind is a word that has more than one meaning. Your mind is your brain, and this also refers to your intelligence or your mental state. Mind also means to care or to watch over. There are many mind quotes that can be motivating or inspirational that can be found on the Internet. If you are losing your mind then you are slipping mentally, but if you agree to mind the neighbor's pet while they are out of town then you will look after the animal and care for it. There are exercises which can work out your mind and improve your mental flexibility the same way that push ups and jumping jacks work out and tune your body. When you change your mind then you reverse a previous decision that you have made.