You can get aphorisms on refrigerator magnets.
If you search the internet, you can get long lists of aphorisms, or find aphorisms made into graphic images.
Some, like Oscar Wilde, have a real knack for aphorism:
We are all in the gutter, but some of us are looking at the stars.I am partial to this aphorism from Soren Kierkegaard:
What I really need is to get clear about what I must do, not what I must know.Kierkegaard, though preoccupied with other things, is pretty much on target with Karl Marx. In his Theses on Feuerbach, Karl Marx authored what may be my favorite aphorism of all:
The philosophers have only interpreted the world, in various ways; the point is to change it.