Fall, of humanity

On account of their relation to Adam, all human beings have an inherent bias towards evil due to sin. Individual acts of sin reflect this bias, often referred to as “original sin”.

All human beings, except for Jesus Christ, are sinful

Romans 3:23; Hebrews 4:15 See also Genesis 6:5, Genesis 6:11–12; Psalm 14:1–3, Psalm 51:5; Isaiah 64:6–7; John 8:7; Romans 3:9–20, Romans 5:12–19; Ephesians 2:1–3

for all have sinned and fall short of the glory of God,

For we do not have a high priest who is unable to sympathize with our weaknesses, but we have one who was tempted in every way that we are, yet was without sin.

Every part of a person is affected by sin

The heart

Jeremiah 17:9 See also Genesis 6:5, Genesis 8:21; 1 Samuel 17:28; 2 Chronicles 12:14; Psalm 66:18; Jeremiah 5:23; Matthew 5:28, Matthew 15:8, Matthew 15:19

The heart is deceitful above all things and beyond cure. Who can understand it?

The body

Romans 6:6 See also Romans 6:12–13; 1 Corinthians 6:13, 1 Corinthians 6:19–20

We know that our old self was crucified with Him so that the body of sin might be rendered powerless, that we should no longer be slaves to sin.

Human nature

Romans 8:5–8 See also Romans 7:5; 1 Corinthians 5:5; Galatians 5:19–21, Galatians 6:8; Ephesians 2:3

Those who live according to the flesh set their minds on the things of the flesh; but those who live according to the Spirit set their minds on the things of the Spirit. The mind of the flesh is death, but the mind of the Spirit is life and peace, because the mind of the flesh is hostile to God: It does not submit to God’s law, nor can it do so. Those controlled by the flesh cannot please God.

Believers are warned not to fall from grace

Hebrews 3:12–14 See also Matthew 24:12–13; 1 Corinthians 15:2; Galatians 5:4; Hebrews 4:11, Hebrews 12:15; 2 Peter 3:17; Revelation 2:4–5

See to it, brothers, that none of you has a wicked heart of unbelief that turns away from the living God. But exhort one another daily, as long as it is called today, so that none of you may be hardened by sin’s deceitfulness. We have come to share in Christ if we hold firmly to the end the assurance we had at first.

God is able to keep believers from falling

Jude 1:24 See also Job 33:14–18; Romans 16:25; Ephesians 6:13; 1 John 5:18

Now to Him who is able to keep you from stumbling and to present you unblemished in His glorious presence, with great joy —