The answer Im afraid is NO, not everyone can be a medium.

Most of those who are mediums are born that way even if they come to it after severe long term illness or accident.

There are reasons for this:

1. The physical body needs to be a certain way to be able to deal with the energy used.

2. The persons mind needs to be a certain way to deal with the spirit who will come to guide, or bring messages. To weak a person would soon fall down.

3. The person needs to have a certain emotional make up to deal with the emotions that the spirit brings (ie the moments before their deaths, how they died etc).

4. The person needs to be able to cope with the 'awakenings' when their energy is increased to enable their mediumship to advance.

On top of this there is how the social family treat a medium etc.,

It is not an easy life, its very hard, so those who are born into it have to be a certain way.

Those who want to be mediums but are not born to it, sit for years in circles getting absolutely nothing at all - Iv seen it, they often go on to be great administrators in the church.

As said before everyone is psychic but not everyone is a medium.