One main sign of a fellow who has become born-again is the lifestyle of the person will become new. This transformation of spiritual living quality is often obvious. When Zacchaeus the publican met with the Lord Jesus in Jericho, his life didn't remain the same.
These days a lot of individuals profess that they have become born again but still move on with their sinful way of life as though nothing has changed in their life. The thief still continues to steal and yet he professes to be born again.
The adulterous lady who becomes successful in snatching another lady's legally wedded husband is still living conveniently with the man, yet speaking in tongues! When a fellow genuinely becomes born again the fellow's life must display that a change has happened. John the Baptist, when speaking to the people that came to be baptized by him advised them to bear the fruit of true repentance. True repentance leads to a complete transformation from a past sinful lifestyle.
Different people came to John the Baptist to be Baptist, even the religious leader's generation humbled themselves. This is a lesson for the people professing to have risen through the level and files of setting up Churches and ministries: there is an always present need to seek spiritual growth.
This may also tell about a lot of the older generation accepting the Pentecostal experience. Such individuals make sure to bring fruits to meet for repentance, doing away with their past sinful habits and way of life. A renewed spirit has gone through a change. Sometimes, one may be a need to change friends, eating and dressing patterns, etc, to conform to the image of the Lord Jesus Christ.