25 But the one who looks at the perfect law of freedom and remains committed to it—thereby demonstrating that he is not a forgetful hearer but a doer of what that law requires—will be blessed in what he does. – James 1:25 ISV
8 For it is by grace you have been saved,through faith—and this is not from yourselves, it is the gift of God— 9 not by works, so that no one can boast. — Eph. 2:8, 9
someone who accepts and helps to spread the teachings of a famous person
One can be a Christian without actually being a disciple. You can accept Jesus as your Savior and go on with your lifestyle pretty much unchanged (I don’t know how that is possible, but some claim to be able to do so). But a true disciple follows after his chosen leader, uses His life as an example to follow, spreads His doctrines and teachings and encourages others to do the same. Those who are disciples of sect leaders and worldly religions take the idea of being a disciple much more serious than a lot of us Christians. Some of them take it so far as to be considered “militant” in their actions. Their actions are governed by anger and hate and wrong teachings. Our actions are governed by love, but that just means that we have to be kinder in spreading the Gospel of Jesus, not less active or effective. We have a message of perfect love and freedom, which is what the world really desires. We have the Holy Spirit inside us and working with us using the same resurrection power that raised Jesus from the dead. If we are obedient to Jesus’s words that we should “make disciples” then we will “be about our Father’s business”. That requires us to do the same works that Jesus did when He was here on earth. As Christians, we are not called to be spectators but, rather to be participators, in the work.