To stand firm in the faith you have to know the faith. You have to be grounded in the scriptures. You have to be truth-driven, scripture-soaked and washed. You have to know and articulate the Gospel. You’re only able to stand firm and put off the fear of man when you are informed by the fear of God.
We need a dogged tenacity, a voraciousness for the truth of the word of God marked by a red-hot devotional life. Ransack your Bible, tear through it with urgency and let it work your soul out and work into the DNA of who you are. You need that spiritual stability.
Remember how Jesus responded when he was tempted by Satan – He went to scripture. Again and again He said, “It is written…” To stand firm in the faith, you have to be able to call on scripture when you’re under attack.