Spring - rejuvenation. Fire - passion. Hercules - courage. Romeo and Juliet - love.
Symbols are the root of our language. If we remove the little connective words between them, we would still be able to understand one another at some level. Some meanings have been lost, some altered. What once meant war now means peace. Each day, with the people and events that become important to our society, we gain more symbols. Communication is dynamic, but it is also strongly related to our culture.
We send little "messages" into space, hoping that, whoever out there might receive it, they will understand. Who we are, where we come from, that we wish to communicate. We might be successful in being understood or we may not, but we certainly hope so.
Even within our own minds, some notions have different meanings. Some are afraid of clowns, while some are amused by them. Childhood traumas can turn into phobias that would mean nothing to other people.
We each have an opinion and our own feelings on every subject imaginable. Still, we are able to communicate and understand one another, partaking in a bit of the other's own inner vocabulary.
Maybe one day, when the time comes, we could establish a fruitful means of communication with cultures very different than ours, as humans.