Situation Quotes - page 45
When someone goes to the doctor and says, "I hear a voice in my head," he or she will most likely be sent to a psychiatrist. The fact is that, in a very similar way, virtually everyone hears a voice, or several voices, in their head all the time: the involuntary thought processes that you don't realize you have the power to stop. Continuous monologues or dialogues. You have probably come across "mad" people in the street incessantly talking or muttering to themselves. Well, that's not much different from what you and all other "normal" people do, except that you don't do it out loud. The voice comments, speculates, judges, compares, complains, likes, dislikes, and so on. The voice isn't necessarily relevant to the situation you find yourself in at the time; it may be reviving the recent or distant past or rehearsing or imagining possible future situations. Here it often imagines things going wrong and negative outcomes; this is called worry.
Eckhart Tolle
In the Church which was founded at Corinth, St. Paul had special difficulties of the kind I have mentioned. In that flourishing commercial city, which through its shipping and situation, maintained a vital connexion between East and West, numerous crowds of people flocked together from all quarters, different in speech and in culture. As they mingled with the inhabitants, they produced, by contacts and contrasts, new and ever new differences. Even in the Church this differentiation endeavoured to make itself felt in sects and parties; and a kind of pagan wisdom made a special attempt to force itself forward as a teacher of truth. In his first letter to this church, from which the text I read is taken, St. Paul strongly combats this tendency.
Søren Kierkegaard