What does it mean that Christ will return without sin?

The phrase 'without sin' in Hebrews 9:28 indicates that Christ's second coming will not be for the purpose of atoning for sin, as He did during His first coming. Instead, He returns to bring complete salvation to those who eagerly await Him. This return signifies the end of sin's presence and the establishment of righteousness for believers. His role at the second coming is to welcome those who have placed their faith in Him, contrasting His first appearance, where He was made sin for us, with His glorious return where sin will be eradicated from His presence. This promise of salvation assures believers that they will experience eternal life unmarred by sin.