Perseverance reveals genuine believers. It's in the Bible, Mark 13:13, NIV. "All men will hate you because of Me, but he who stands firm to the end will be saved."
Perseverance reveals genuine faith. It's in the Bible, Hebrews 3:6, TLB. "But Christ, God's faithful Son, is in complete charge of God's house. And we Christians are God's house—He lives in us!—if we keep up our courage firm to the end, and our joy and our trust in the Lord."
Victory is promised to those who persevere. It's in the Bible, Philippians 3:13-14, TLB. "No, dear brothers, I am still not all I should be but I am bringing all my energies to bear on this one thing: Forgetting the past and looking forward to what lies ahead, I strain to reach the end of the race and receive the prize for which God is calling us up to heaven because of what Christ Jesus did for us."