To be invincible is to be incapable of being defeated. When you give your life to Jesus Christ and accept Him as your personal Lord and Savior He makes you invincible. 1 Corinthians 5:1 says "Therefore if anyone is in Christ, he is a new creature; the old things passed away; behold, new things have come." And, John 10:28 says "and I [Jesus] give eternal life to them, and they will never perish; and no one will snatch them out of My hand." You die to yourself, to your earthly desires, so what remains is your spirit which can never die!
Someday, all of us will die. That is a fact. But if you know Jesus, you live forever with him. You can be invincible, too!