I have a cube, and I would like it to have a text inscribed in it, so the text would be in the cube but we could see it. Is it possible to do this?
You could also use Knife Project.
There are plenty of ways to do this:
1.) You could apply a texture of a text, and use it as a displacement in the displacement modifier.
2.) You could create your text with blender text (add some thickness to it), then tessellate it so it becomes a mesh, and then apply a boolean operator on your cube with the text (depending on, if want it inscribed or extruded appearance).
I would recommend (2.) as it involves much cleaner operations.
Here is a quick workflow, for different results use a different boolean operator.