In ancient Israel, the firstborn son occupied a special position within the family structure. He served as his father's right-hand man, representing the father's authority, and he received a double portion of the inheritance. He also bore special responsibility for the family's welfare, and before the establishment of the Levitical priesthood, he sometimes functioned as a priest. Yet history shows that this status could be forfeited: the elder was occasionally replaced by a younger brother, as seen when Jacob replaced Esau, Ephraim replaced Manasseh, Joseph replaced Reuben, and Solomon replaced Adonijah. This pattern connects directly to Jesus Christ, who is declared Firstborn in three ways: Firstborn over all creation, Firstborn from among the dead, and Firstborn among many brethren. As Firstborn, He is to inherit all things. Believers, through the Spirit of adoption, are called children of God and, if children, then heirs of God and joint heirs with Christ, called to suffer with Him in order to be glorified together. This means believers are invited to share in Christ's inheritance, ruling with Him as kings and priests after the first resurrection—a privilege given to no one else. However, just as the birthright could be lost, believers too can fall out of favor and forfeit this inheritance. The account of Esau and Jacob illustrates this danger. Esau, described as a man of the field, loved worldly pleasures and lived for immediate gratification, while Jacob, dwelling in tents, had his eyes fixed on the eternal promise given to Abraham. When Esau, weary from the field, sold his birthright for a meal of stew, he "despised" it—treating something sacred as unimportant. Afterward he rose and went his way without reflection or regret, showing that his statement about being "about to die" was merely a figure of speech rather than genuine crisis. The New Testament identifies Esau as a "profane person" who sold his birthright for one morsel of food, meaning he treated something holy as common. Though he later sought the blessing with tears, he found no place for repentance, for the loss was irrevocable. This serves as a warning that believers can likewise treat their calling and inheritance as unimportant, delaying repentance under the false assumption that "later" will always be available. The stories of individuals who postpone returning to faithful commitment—saying "eventually" or "when I get good and ready"—mirror Esau's attitude of valuing temporal satisfaction over eternal promise. Scripture warns that no one can serve two masters, and that the love of money and worldly desire can lead believers away from the faith into sorrow. True repentance requires putting to death the deeds of the flesh, since living for self-satisfaction risks losing what is eternal. Because life is brief compared to eternity, believers are urged to stop feeding fleshly lusts and instead hold fast to their inheritance, heeding the warning to let no one take their crown.