Why a second installation? My joke has been, that this was like a second installation for a computer software upgrade, or a re-installation that is performed when some quirks or corruptions have occurred that make the original software no longer perform properly. More seriously, my prayer is that this occasion will be an event that gives us a new start, a new beginning, and returns us back to "proper settings", God's direction, for mission and outreach. We might think of it as the stirring up of the Holy Spirit, as Pentecost was all about.