We must collectively prepare, so that Christ will be welcomed when He comes again in glory. Finally, although we prepare for His final coming, reality tells us that He may call of from this world before His final and glorious return. We prepare our personal lives, so that we are prepared to meet Him whenever He may call us home. Having a deeper relationship with Jesus and opening our hearts to His grace is not always an easy task, it takes a lot of hard work. That is the primary purpose of Advent.
Advent preparation is simple.
It does not take something extraordinary. The Kingdom of God is at hand. The Church is a great Mother, caring for Her children and leading them to Christ. She provides us with the means to respond to the Gospel call. Advent is a time for soul searching.