In the first century shepherding was a very common profession.  Every good shepherd would tirelessly love and care for his sheep.  Feeding and watering the livestock remained an unending endeavor.  Every shepherd was also tasked with fending off hungry predators and keeping their sheep free from dangerous parasites.  Over time, the sheep would come to trust in and rely upon the individual guiding and protecting them.  After many days and nights of grazing in the open fields, the shepherd would need to rest.  Upon returning home, he would place his animals in a pen where he knew they would be safe.  Jesus is the ‘Good Shepherd.’  He came to gather his sheep together and lead them to safety.  In this parable, the sheep pen is meant to represent heaven; there remains a single gate through which one can enter.  Only those who have faith in and follow Jesus Christ are granted access to God’s kingdom.