Sin entered the world when Adam and Eve rebelled against God. Sin broke the unhindered fellowship they had with Him and brought shame, death, and separation, as seen when Adam and Eve were removed from the Garden of Eden (Genesis 3:1–24). Because God is holy and sin is opposed to His character, our sin creates a real barrier between us and Him (Leviticus 19:2; Isaiah 59:2). This problem affects every person because “all have sinned and fall short of the glory of God” (Romans 3:23). The consequence of sin is death—death entered the world physically and living in our sin, separated from God, leads to permanent, eternal death (Romans 6:23). Yet God did not leave humanity separated from Him—He pursued sinners and promised a Redeemer, sending Jesus to reconcile us to Himself (Genesis 3:15; 2 Corinthians 5:18–21). Jesus took the penalty for our sin through His death and rose again, conquering sin and death for all who trust in Him. The tearing of the temple veil showed that through Christ, the barrier between God and His people had been removed (Matthew 27:50–51; Hebrews 10:11–18). Everyone who trusts in Christ for salvation is forgiven and reconciled to God (Romans 5:1–11; Romans 8:14–17). The permanent separation is gone when we believe. Still, believers sin after salvation, and that sin impacts our relationship with God (and others). While Christians never lose their salvation, sin disrupts our fellowship with God, which is why it's important not to live in unconfessed sin. Instead, we should confess our sin, turn from it, and walk in the Spirit instead of in the flesh, refusing to let anything come between us and the God who made the way for us to be near to Him (1 John 1:9; Galatians 5:16).
Think about what happens when something comes between you and someone you love. Maybe unresolved conflict, a lie, bitterness, pride, or simply drifting apart over time can create distance in a relationship that once felt close. You can still know the person, but something has gotten in the way of the relationship.
Sin does something similar between God and us—only on a grander scale. Sin is not merely breaking a rule; it is rebellion against the God who created us and loves us. All sin disrupts the relationship we were made to have with Him. And all sin leads to death. It's why death exists in the world and is the outcome for all who reject Him. This is why sin is the greatest problem that humanity faces.
God has made it possible for us to not be separated from Him, the One who is all good and faithful and in control. If you have not trusted in Jesus' death and resurrection for the forgiveness of sins, the reality is that you are separated from the God who made you, and your outcome will be eternal separation from Him and all that is good; yet God has made a way back through Jesus. Christ died for sinners and rose again so that those who turn from their sin and place their faith in Him can be forgiven and reconciled to God (Romans 5:8–11; 2 Corinthians 5:17–21). Don't remain separated from the God who is pursuing you—turn to Christ, trust Him, and receive the reconciliation and life He offers.
For those who have already trusted in Christ for the forgiveness of sins, sin still impacts our relationship with God (and others, for that matter). Unconfessed sin disrupts our fellowship with God, like an elephant in the room that no one wants to talk about, and keeps us from experiencing the closeness and freedom He desires for us (1 John 1:5–9). So don't allow pride, hidden sin, bitterness, sexual sin, greed, or anything else to create distance between you and God—confess it right away, repent, receive His forgiveness, and walk by the Spirit rather than letting sin control your life. What God has for you is far greater than the sin that ensnares and separates you from Him.