Peter, John and James laid down their weapon in a most crucial time. 
They put away prayer and then fell asleep. Not because they didn’t care for Jesus, but because they underestimated the battle they were part of.
Jesus spoke to them “watch and pray that ye enter not into temptation: the spirit indeed is willing, but the flesh is weak”.
Reminder to us: We’re in a battle. Stay focused. Stay prayerful. Use the resources Christ has given you.