We know what they are, and what they mean. Do they mean something else here?
A symbol is a sign which represents something else. A red cross might suggest an idea, or even an ideal. The symbol ‘2’ might represent a duality, the possibility of another.
We identify with symbols (flags or crosses, for example). They give us a basis for understanding who we are, what is our place in the world.
Does the placing of a symbol within a frame constrain it? Placing two disparate symbols within a frame could alter the meaning of both. Or could it?