Two natures in men

 The concept of "two natures in men" in the Bible, particularly related to believers, refers to the idea that individuals have a natural, fallen nature inherited from Adam and a new, spiritual nature given through faith in Christ. The old, natural nature is associated with sin and weakness, while the new nature, empowered by the Holy Spirit, enables believers to live a life pleasing to God. 

Here's a more detailed explanation:

The Old Nature (Fallen Nature):

This is the nature inherited from Adam's fall, characterized by sin and a tendency towards self-centeredness. It's also referred to as the "flesh" or "old man" in some contexts according to the Bible. 

The New Nature (Spiritual Nature):

This is the new life given to believers through faith in Christ and the power of the Holy Spirit. It's associated with righteousness, holiness, and a desire to live in accordance with God's will. 

 The Conflict:

The two natures often exist in tension within a believer, leading to a struggle between the desires of the flesh and the desires of the Spirit according.

Overcoming the Old Nature:

Believers are called to "crucify the flesh" or "walk by the Spirit," which involves actively choosing to live according to the new nature and seeking the guidance and power of the Holy Spirit. 

The Ultimate Hope:

The ultimate hope for believers is that the old, fallen nature will be completely eradicated in the resurrection, when they receive a new, glorified body according to doctrine.org. 

This understanding of the "two natures" is not a simple dualism (where body and soul are seen as separate and opposed), but rather a concept that emphasizes the believer's ongoing struggle toward spiritual growth and transformation according to Ligonier Ministries. It highlights the power of the Holy Spirit to renew and transform the believer, enabling them to live a life of holiness and righteousness.