What is telepathy?
Telepathy is the process of communicating from mind to mind (or spirit to spirit, to be more precise) without using a physical mechanism (such as voice, telephone, email, and what not). Some might argue that there is some sort of physical mechanism in the brain that facilitates or makes possible the ability to communicate telepathically, and I suppose that is a possibility that this is so, but frankly, I am not interested in the physical side to it, if there is any.
My reasoning is that even if there is a physical mechanism, it still is based in our ultimate source, which is spiritual, and I prefer to look at the source (the spirit and spiritual reasons), or the cause, than to look at the results, or the effect.
There are many forms of telepathy. Generally, as I experience it, it is not as portrayed in the fictional works, where a person can hear every single word as broadcast by another, though telepathy can and does take that form at times. Telepathy is also not something that you need to put a lot of effort into, where you wrinkle your forehead and strain a lot; indeed, such straining can be counterproductive.
Instead, telepathy is what happens when you relax enough to open your inner self to communications that flow both ways on a more fragile and enduring medium than the air. It also very often comes in the form of what I call a "thought ball," where concepts and thoughts and words and emotions and sensations and images are all rolled up into a complexly interrelated whole, somewhat like a large ball of string. It is then the task of the receiver to unravel that ball into a linear communication.