An inheritance is something that a person comes into possession of because of his relationship with another. It is not something that is earned; it is a gift.
The believer's inheritance includes life itself. By receiving Christ as Saviour, the believer inherits eternal life.
Jesus said, "He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation; but is passed from death unto life" (John 5:24).
The inheritance of the believer also includes everything he needs for his life. The believer is actually a citizen of heaven who is on a pilgrim journey on earth. However, God has made all spiritual blessings available to the believer.
God's riches made available to the believer are also emphasized in Romans 8:32: "He that spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things?"
Our present blessings are only a small part of our spiritual inheritance, which is to be received in full in the future.
The moment one receives Christ as Saviour he is placed as a mature son into the family of God and becomes an heir of an inheritance that is beyond human comprehension.
We are to let Christ reign in our lives now, but our full spiritual inheritance includes being with Christ and reigning with Him throughout eternity.
"To an inheritance incorruptible, and undefiled, and that fadeth not away, reserved in heaven for you" (1 Pet. 1:4).