stead·fast
fixed or unchanging; firm; loyal
unwavering in resolution, faith, or adherence

Synonyms: firm, immovable, constant, faithful, loyal

dis·ci·ple
One who embraces and assists in spreading the teachings of another.
a follower of the doctrines of a teacher

Synonyms: follower, learner, apprentice, pupil
Disciple comes from a Latin word literally meaning “learner”

All those who believed and followed Christ were called His ‘disciples’- Acts 6:1-2, 7

Paul originally persecuted the disciples of Christ – Acts 9:1,26

the disciples were first called ‘Christians’ in Antioch – Acts 11:26

It is unscriptural to teach that a person can be a ‘Christian’ and not be a disciple of Jesus Christ.

In Luke 6:46 Jesus sharply rebukes those who were incorrectly addressing Him as “Lord” when they were not obeying His words.

“Why do you call me Lord, Lord, and do not the things which I say?” -Luke 6:46

“A disciple is not above his teacher, but everyone when he is fully trained will be like his teacher.”
-Luke 6:40

The translation ‘fully trained’ is the Greek word Katartizo which means ‘to be made complete, perfect’

“Whoever does not carry his own cross and come after Me cannot be My disciple.”
-Luke 14:27

The Lord GOD(יהוה YHWH, Yod Heh Vav Heh) has given Me the tongue of disciples, That I may know how to sustain the weary one with a word. He awakens Me morning by morning, He awakens My ear to listen as a disciple.
-Isaiah 50:4