If it's worth anything still... read this
infinity can make our lives seem short to compare against, but with infinity, there are no limits. no large, no small, no long, no short; only points of perspective. life grants us the perception of limitation and a perspective view point, gives us minds to engage with, among an infinite number of component parts, and a time to wonder at the wonders of it all. every mind a functional part of an eternal process that knows no boundaries of time or space; infinitely interacting with itself as "each other", and returning to itself to rejoice, and renew. nothing is ever lost in a universe without beginning, end or limit, out-side of what is only imagined to be reality, as reality imagines itself. death marks only the boundaries of the perspective imaginations of ourselves, not out infinite living universe. in part, we belong to the universe and the universe belongs to us... in reality, we are the universe and will continue to become more of what we already are, in an infinite number of ways. Remember with love, the light without limit, at every point along the way!

most people on this post talk about other languages, imagery, symbols or even memories. let's leave memories out for a moment.
imagery and symbols are basically the same as language! they are another way of using our physical senses to communicate. of course, like spoken languages, they are not perfect, they can be miss used, miss interpreted and cannot explain a who sphere of knowledge in itself, in other words they need themselves to complete each other!
but enough about the quantitative knowledge!
so you want to communicate with anything, anyone, anywhere. no restrictions? well the explanation is simple. and Animals all around the world know this as fact and are perfectly adapted to this communication, it is only we, humans, who have unlearned all of this!
I am talking here of communication through emotions, feelings and well memories. most animals like cats and dogs who have been along side us for so long, have developed ways to tap into our conscious mind, and ask us things like food, outside and love
other animals only communicate thought themselves and at very low levels of emotions, like insects: they are cold and only act like cog in a machine rather than individual beings.

still they all communicate without uttering a word or even using visual ques like facial gestures, we humans are used to this so much that's what we imagine by communication on the non-physical.

you must know that humans are muuuch more powerful consciously than any other creature we know of, we are in a waking up stage as of now, and a power that is is trying to keep us asleep, but that is not stopping us!
we will be able to communicate through thoughts, emotions and live memories when we tap into what is called the collective consciousness of the universe, only then will we have the energy to forward our skills to our potential.