And it shall come to pass, that whosoever shall call on the name of the Lord shall be saved. Acts (of the Apostles) 2:21"
Jesus Christ lived an excellent life on earth; He never failed in His earthly ministry. He died, was resurrected, and ascended into heaven. Before He ascended, he left a legacy of His name for us to use to get things done. His name has the same power He used whilst He walked this earth.
When the one who is not born again calls on His name with a repented heart, he/she is saved and given eternal life. When the one who is already born again calls on His name, the name works for him/her, Mark 16:17-18. The name of Christ cannot fail: it has power to save and do miracles.
However, it will not work for those who use it in vain or take His name for granted. It is God's name; hence it should be honored, revered, and worshipped. As a believer in Christ Jesus, know that the name of Jesus Christ is your inheritance and must be treasured and used in righteousness.
Hallelujah!