The teaching in Hebrews 4.12 takes on paramount significance. For the Holy Spirit instructs us therein how to divide spirit and soul experientially. The dividing of these two is not a mere doctrine; it is pre-eminently a life, a must in the believer’s walk. Just what is its essential meaning? It means, first of all, that by His Word and through His indwelling Spirit God enables the Christian to differentiate in experience the operations and expressions of the spirit as distinct from those of the soul. Thus he may perceive what is of the spirit and what is of the soul.

The dividing of these two elements denotes additionally that through willing cooperation the child of God can follow a pure spiritual path unimpeded by the soul. The Holy Spirit in Hebrews 4 sets forth the high-priestly ministry of the Lord Jesus and also explains its relationship to us. Verse 12 declares that “the word of God is living and active, sharper than any two-edged sword, piercing to the division of soul and spirit, of joints and marrow, and discerning the thoughts and intentions of the heart.” And verse 13 follows by informing us that “before him no creature is hidden, but all are open and laid bare to the eyes of him with whom we have to do.” These therefore tells us how much the Lord Jesus fulfills His work as High Priest with respect to our spirit and soul. The Holy Spirit compares the believer to a sacrifice on the altar. During the Old Testament period when people presented an offering, they bound their sacrifice to the altar. The priest then came and killed it with a sharp knife, parting it into two and piercing to the division of the joints and marrow, thus exposing to view all that formerly had been hidden from human sight. Afterwards it was burned with fire as an offering to God. The Holy Spirit uses this event to illustrate the work of the Lord Jesus towards believers and the experience of the believers in the Lord. Just as the sacrifice of old was cut asunder by the priests’ knife so that the joints and marrow were exposed and divided, even so the believer today has his soul and spirit split apart by the Word of God as used by our High Priest, the Lord Jesus. This is that the soul may no longer affect the spirit nor the spirit any more be under the soul’s authority; rather, each will find its rightful place, with neither confusion nor mixture.