How do we know that sin has consequences?

Scripture explicitly tells us in Romans 6:23 that 'the wages of sin is death.' This refers to the inevitable outcome of sin which is not only physical death but also spiritual death, marked by separation from God. The notion is repeated throughout biblical texts, presenting sin as the root cause of death and destruction. This reality is conveyed through the account of the rich man in Luke 16, whose eternal suffering in hell illustrates the unending consequences of a life lived apart from Christ. Thus, sin has grave consequences that persist into eternity.