The Human Spirit
According to the revelation of the Bible and the experience of believers, the human spirit can be said to have three main functions. These three functions are
conscience (Rom. 9:1; 8:16),
intuition (Mark 2:8), and
communion (John 4:24). The conscience is the part of the spirit which distinguishes right from wrong and is not influenced by knowledge stored in the mind; it is rather a spontaneous direct judgment. The intuition is the “knowing” part of the spirit. All true knowledge originates not in the mind, but in the spirit. The revelations of God and the movements of the Holy Spirit are known to the believer through his intuition. A believer must, therefore, take care to heed these two aspects of his spirit: the speaking of his conscience and the teaching of his intuition.
Communion is the third function of the spirit, and is related to the worship of God. The soul is not competent to worship God. According to John 4:24, “God is a Spirit and they that worship Him must worship Him in spirit and in truth.”
The Human Soul
Not only does man possess a spirit which enables him to function in the spiritual realm; he also possesses a soul which is the organ of his self-consciousness. The soul is the seat of the human personality. The ingredients which make us human beings belong to the soul. The intellect, thought, ideals, love, emotion, understanding, decision, choice, and other like qualities are all associated with the soul. The three main functions of the soul are the
will (Job 7:15), the
mind (Lam. 3:20, RSV), and the
emotion (2 Sam. 5:8; Deut. 6:5). The will is the instrument for making decisions and choices. The second function of the soul is the mind, the instrument for thinking. It is in this part of the soul that man reasons and has knowledge (Prov. 2:10). The third function of the soul is the emotion. This is the instrument of likes and dislikes. Through the emotions we are able to express love or hatred, joyfulness, anger, sadness, or happiness. A shortage in this area will render us insensitive. By a careful study of the Bible we cannot help but be impressed that these three primary functions of the personality belong to the soul.
http://www.contendingforthefaith.org/responses/bible-answer-man/appendix/are-soul-spirit-same.html