Slichot the week before Rosh HaShanah is the Hebrew Calendar/Jewish Year equivalent to Moses' week-long daily rehearsal of assembling and disassembling the Mishkan prior to erecting and inaugurating it on Rosh Chodesh Nissan. These parallel "weeks" on both sides of the Jewish Year prepares us for receiving G*d's presence, both externally and internally.
Jewish Astrology teaches us that this is one of the most difficult weeks of the Jewish Year - the transition from the last (waning)
Quarter Moon of Elul through the New Moon and then Rosh HaShanah - the
only one of the 12 Hebrew Months whose Molad (time of "birth") we don't
announce publicly in Shul the Shabbat prior to arrival. This week also
contains the sharp turn of the Seasonal Year at the Autumnal Equinox,
just prior to the New Moon.
This week is one of vulnerability in the
realm of physical health due to the change of seasons/change of
energy/Elul's association with the Sign of Virgo and the "Healing Arts",
Most vulnerable are those who have not taken
advantage of Elul's cleansing properties and made transformative
adjustments in the realm of their emotions and thoughts.
It's not too late. Don't give up - but guard your energy levels, your health, in particular your immune system.
Personally, I believe sound has the power to heal. Hence the importance of Slichot - particularly this week.