1. The work and expression of Christ determines His substance, determines His substance. He is able to complete with a true heart that which has been entrusted to Him. He is able to worship God in heaven with a true heart, and with a true heart seek the will of God the Father. This is all determined by His substance. This is all determined by His substance. And so too is His natural revelation determined by His substance; the reason His natural revelation is so called is because His expression is not an imitation, or the result of education by man, or the result of many years of cultivation by man. He did not learn it or adorn Himself with it; rather, it is inherent within Him.
2. Man may deny His work, His expression, His humanity, and the entire life of His normal humanity, but none can deny that He worships God in heaven with a true heart; none can deny that He has come to fulfill the will of the heavenly Father, and none can deny the sincerity with which He seeks God the Father. Though His image is not pleasing to the senses, His discourse not possessed of an extraordinary air, and His work not as earth-shattering or heaven-shaking as man imagines, He is indeed Christ, who fulfills the will of the heavenly Father with a true heart, completely submits to the heavenly Father, and is obedient to the death, is obedient to the death. This is because His substance is the substance of Christ. This truth is hard for man to believe but does indeed exist.
from “The Substance of Christ Is Obedience to the Will of the Heavenly Father” in The Word Appears in the Flesh