Let's talk about the word steadfast. The word (from the Greek) means: (to sit); sedentary, that is, (by implication) immovable: - settled, steadfast. Simply stated, this word means to sit or plant yourself firmly. Steadfast means that you don't drift back and forth, or as Paul says, "be carried away by every wind of doctrine." (See Ephesians 4:14) What you need, to be a powerful Christian bringing much glory to Jesus, is to be steadfast. You need to be settled in on and permanently sitting on God's Word. God's Word is forever settled in heaven. "Forever, O LORD, Your word is settled in heaven." (Psalm 119:89)
Paul also uses the word immovable. From the Greek there is another extremely descriptive word for immovable. Get ready to write this down because it is so immensely profound. Here it is: UNMOVABLE. Got ya! What the world needs now are followers of Jesus who are not only steadfast, but they are also unmovable. Unmovable believers are not moved by circumstances, feelings, or the personal opinions of others. Instead they are settled and anchored to God's Word, and at the same time building on their relationship with Him as the Word is applied in their lives.
Steadfast and unmovable Christians are anchored to the Rock of all Ages, but yet they are moving forward in the things of God. They learn and hold firm to the immutable principles of God's Word, provoking the supernatural work of God in and through them. The result is they are spiritually effective in their call as they grow in the grace and the knowledge of Jesus.
ALL Christians should be Steadfast and immovable (unmovable). But the only legitimate reason for being steadfast and immovable is for the purpose of abounding. Abounding in what? Abounding in the work of God! So what does the word abounding mean? From the original Greek we see powerful descriptive words like: Superabound, excel, more, abundance, more abundant, exceed, increase and more! Doing the work of God should be our number 1 priority! As a matter of fact, we should be obsessed with doing the work of God. Doing God's work should far exceed any other desire we have in this life! The desire to do God's work should by far excel even our personal desires.