People learn a lot about our personalities by our lifestyle. We must be obedient to Christ and His teachings. Christianity is all about emulating the lifestyle of Jesus when He was on earth. The first disciples where called christians because they behaved so much like Christ.
That is the whole point of Christianity and being a disciple of our Lord Jesus Christ. Many people today can themselves christians simply because they were born in a christian home. But that is not the basis of Christianity or being a true disciple of Christ Jesus. What makes us a true disciple is how we live our lives.
A true disciple is one who stays true to what he or she believes and stands by it at all time. This is the ability to not compromise despite what may come their way. Jesus's disciples faced a lot but we do not see them compromise. They even counted it joy to be persecuted for the Lord's sake.
