What should you keep your mind fixed on?

You should keep your mind fixed on the course of life you wish to lead and hope that it may be realised—

If the hopes you entertain are good ones, and you are worthy of their being realised, they will inevitably be so, and you will be happy. 

If, on the contrary, your hopes are mercenary and selfish, they may also be realised because you will call spirits to your aid in the latter case just as certainly as you do in the former, but you will never be happy. 

Hence, you see the importance of living in constant hope, having, in short, your will constantly fixed on the goal you have in view, and striving for it.