Though society and even the Church often turn a blind eye to the workings of spirits, the fact is that they exist and the fact is also that -- among their repertoire -- is what might be called "spiritual transference": spiritual energies can be transmitted through people, communication, and things, including at a distance. A person can walk right in with a spirit attached to her or him.
Did you ever receive an e-mail that had a special, persistent "poison" or sting -- beyond psychological? A communication -- via phone, via regular letter, in person -- that left an acute, almost tangible oppression or tension (or both)? Have strange things occurred after connecting with someone who may have spiritual baggage?
Read more here: http://www.spiritdaily.com/spiritualtransference.htm