“Vigilance is the mark of the followers of Jesus. They know that “the gate is wide and the way is easy that leads to destruction” (Matt. 7:13). They are serious about life. Heaven and hell are at stake. Therefore, they are seriously joyful. The Son of God has rescued them from the guilt and power of sin. They are children of God. There names are written in heaven. They have received the Helper, the Spirit of truth. They have the promise of Jesus to be with them to the end of the age. They know that he is praying for them. They rejoice that they stand righteous before God because of Jesus. They have received the kingdom. They have eternal life as a present possession. And they marvel that no one can snatch them out of God’s hand. In this joy they are energized to strive to enter by the narrow door. And they are confident their striving will not be in vain.”

This is from my current favorite book by John Piper, What Jesus Demands From the World. If you haven’t read it, do so!