We remember that Peter made this promise, but we forget that all the other disciples said the same, “I will not deny you.” Jesus had taught his disciples that the cost of discipleship involved denying oneself, taking up one’s own cross daily and following him (Luke 9:23). Yet, he predicted that Peter would deny him three times before the rooster crowed. I think Peter meant it. And so did the other disciples. They all wanted to be able to deny themselves and follow Christ, even unto death. Their spirits were willing, but their flesh was weak (Mark 14:38). It wasn’t until after the Day of Pentecost, when the disciples were filled with the Holy Spirit, that Peter was able to truly deny himself and follow Jesus even unto death. We must be filled with the Spirit and walk in the Spirit in order to deny ourselves and truly follow Jesus.