Keep Up! Hebrews 2-4. Second in our Don’t Stop Now study of the book of Hebrews, Keep Up! is an urgent call to stay on course. When you came to the Cross you made some promises to God that you need to keep. This in-depth study will spur you on to grow in your love for Christ; to hunger more after His Word, and to continue fueling your fire for God’s kingdom. Let these five fervent studies from James MacDonald revive your heart in your commitment to Christ.