On earth when He had assumed human form, He was then also become subject to God's laws and man's laws as well as humans diseases and suffering. He was likewise capable of committing sins which He didn't. But when He take His place in the Throne of heaven everything will be back on its former course. The important thing is that He experienced how it is to be like humans and by His not sinning as a man and for being obedient to God's laws while He lives among us He had earned the right to be our Ultimate Judge. Even the angels and cherubims have not experienced how to become human that's why Jesus is exalted above them. Jesus can say, 'I have been there.'