Dr. Norman Geisler presents the biblical doctrine of man in his extensive Systematic Theology. His description of the model of man is compatible with–or identical to–holistic trichotomy: one in personhood with two separable parts, yet three distinguishable parts (aspects).

“Each individual human being is a unity of soul and body, having a spiritual dimension and a physical dimension. Each partakes of the immaterial as well as the material, the angelic as well as the animal. As such, human beings are unique: each is a psychodynamic unity, a blend of mind and matter.

…At death, ‘The dust returns to the ground it came from, and the spirit returns to God who gave it’ (Eccl. 12:7)…Paul speaks of ‘spirit, soul, and body’ forming an individual ‘wholly’ (1 Thess. 5:23); that is, these three aspects constitute one person.

However, within this basic unity is a tri-dimensionality, because a human being is self-conscious, world-conscious, and God-conscious. He can look inward, outward, and upward. But he is, nonetheless, one person, with one individual human nature.

Within the unity of human nature, there is also a basic duality. The unity of soul and body is not an identity of the two; the union is not an indissolvable one. As death ‘we are…away from the body and at home with the Lord'(2 Cor. 5:8)…The separation is only temporary: They await their reunion at the resurrection, when they will be brought back together permanently (1 Thess. 4:13-17).

Systematic Theology (One Volume Edition, pp636, 37 Minneapolis: Bethany House, 2002).