In the parable of the ten virgins Jesus mentions there are five wise and five foolish.  All ten virgins are representatives of the church and we as individual Christians have to ask if we are wise or foolish.  Ultimately the wise were prepared for the Lord's return while the foolish were not ready.  Unfortunately there are many people attending church weekly who think they are ready for the Lord's return but they are in fact not ready.    Jesus instructs us to watch and be ready no matter how long it takes before His return because none of us knows the day nor the hour of His return.