Matthew 5:13 Ye are the salt of the earth: but if the salt have lost his savour, wherewith shall it be salted? it is thenceforth good for nothing, but to be cast out, and to be trodden under foot of men.
Years ago, I heard an anointed missionary and personal friend speaking on the consequences of sin. He told a story about a pair of brothers he knew quite well.
In his teenage years, the older brother went through a time of rebellion against his Christian upbringing. He went to a few parties, drank a little alcohol, tried a few drugs and quickly felt convicted of his behavior and repented before the Lord. While it was only a short few weeks of rebellion, it made a real impression on his younger brother. You see, he was looking up to his big brother. And in those few months of watching him rebel, he decided that trying out a worldly thing or two himself was okay to do.
The older brother readily overcame that time of rebellion. He went on to Christian college and grew to be a wonderful man of God. He traveled all over the world teaching, reviving and leading many to the Lord.