A Christian is a follower of Jesus of Nazareth, referred to as the Christ. Christians believe Jesus to be the Son of God, who lived a life befitting that of the creator of the universe, free of sin and full of love, who at the end of his earthly life was crucified, and then on the third day, rose from the dead, and later ascended into heaven.
Chrisitianity is just the beleif in christ being our savior, a cult can be a chirstian faith