May the God of peace himself sanctify you completely. May your whole spirit, soul, and body be preserved blameless at the coming of our Lord Jesus Christ.
We must notice, however, this division of the constituent parts of a man; for in some instances a man is said to consist simply of body and soul, and in that case the term soul denotes the immortal spirit, which resides in the body as in a dwelling. As the soul, however, has two principal faculties — the understanding and the will — the Scripture is accustomed in some cases to mention these two things separately, when designing to express the power and nature of the soul; but in that case the term soul is employed to mean the seat of the affections, so that it is the part that is opposed to the spirit. Hence, when we find mention made here of the term spirit, let us understand it as denoting reason or intelligence, as on the other hand by the term soul, is meant the will and all the affections. 