My Thoughts
They are like persons met upon a journey; I think them very agreeable at first but soon find, as a rule, that I am tired of them.
Our Ideas
They are for the most part like bad sixpences and we spend our lives in trying to pass them on one another.
Cat-Ideas and Mouse-Ideas
We can never get rid of mouse-ideas completely, they keep turning up again and again, and nibble, nibble—no matter how often we drive them off. The best way to keep them down is to have a few good strong cat-ideas which will embrace them and ensure their not reappearing till they do so in another shape.