Christ is the center of our confession of faith in the gospel, both in creed and public testimony. Surely, the readers would not give up Christ, whom they had professed, and reject what He had done for them, if they could understand the superiority of His person and work.
Hold fast does not refer to how to be saved or remain saved. It means rather that perseverance in faithfulness is proof of real faith.
Commentary from the MacArthur study Bible, notes for Hebrews 3:1,6.
Hold fast: holding on, or the perseverance of the saints, is the human side of eternal security. It is not something done to maintain salvation, but is rather an evidence of salvation.
Commentary from the MacArthur study Bible, notes for Hebrews 10:23.
Faith persevering in trial, Psalm 40.
Profiting from Perseverance
People can be easily discouraged in the face of adversity-like John Mark, the cousin of Barnabas, who accompanied Paul and Barnabas at the start of their first missionary journey. As they prepared to enter the difficult region of Asia Minor, John Mark left and returned to Jerusalem. John Mark had not yet learned that “tribulation produces perseverance; and perseverance, character; and character, hope.”
If you are thinking of quitting something that is difficult, think of the character and hope you will forfeit if you do.
“Genius, that power that dazzles mortal eyes,
Is oft but perseverance in disguise.” Henry Austin
Commentary from the Pathways devotional, by David Jeremiah, May 18.