In Scripture, the terms “life” and “death” are used in various connections, and so in senses which differ. They are used as to the natural body; they are used, also, as to the moral inward state of man; and they are used as to man in his eternal state. Man, as at first created, was, as a creature, morally alive when placed in Eden. He had natural life in his body; he had not eternal, divine life in body, soul or spirit.
Disobedience brought in moral death — death in trespasses and sins; it entailed mortality on the trespasser, laid him under the power of (physical) death, and pointed onward to the second death – eternal separation from God.
Faith gives a new, a divine nature, a seed that is incorruptible. To that seed belong affections, thoughts, intentions, desires, which all flow from Christ, and lead back, by the Spirit, to God. This is shown in us while in the body, while on our way to God — while waiting for Christ, and for the glorious bodies which He will give to us. God has given to us eternal life, and this life is in His Son.
G. V. Wigram