Keeping this Monkey at ease is like a circus of all the kinds, so understanding the nature of Mind will make you use it better.
It's an excellent tool to see through even the things and situations that normally would look very plain and basic or very difficult and complicated.
Just remember the mind does not understand logic. It is so smart and so naive at the same time that what ever you make it understand it will take it.
So Smart is what ever you give it will build on it and bringing in all kind of pleasant or nasty experiences.
So Naive as it doesn't have it's own mind and your inputs are the only source so you need to be conscious of what you feed in.
You will be at ease when what is absorbed is conscious and important for your wellbeing.