mind
The Italian word 'mente' is used much like the English word 'mind'. It refers to the human consciousness or thought process. For example, 'Ho cambiato idea' translates to 'I changed my mind'. It can also be used to refer to the intellect or brain in a similar manner as in English.
I changed my mind about that restaurant.
This sentence means that the speaker originally had one opinion about the restaurant, but it has now changed.
Think with your mind, not with your heart.
This is a way of saying that you should make decisions based on logical thinking, not emotions.
I can not read your mind.
This means the speaker cannot know what the other person is thinking without being told.