Men have not seen God as the angels had, then what makes us think we do not have the ability to rebel against God and fall away when the angels had seen God and rebelled? Are men that arrogant? I do not think all of the third of the angels went willing but since they were under Lucifer's authority, many were deceived into rebellion. This is why it is so important that one finds a good church for you fall under that authority. But most importantly, you must continue to keep a constant relationship with the Lord feeding and drinking from Him every day. You must put in the effort to study, read, pray, and worship daily. Otherwise, you will begin to drift and fall away back into the world.
If you had drifted away, repent and Return to you First Love. He is coming back!!!!