"Seek Hashem When He is Present" 

Our Sages teach us (Rosh Hashanah 18a) that the words of the verse "Seek out Hashem when He is present, call Him when He is near," refers to the days between Rosh Hashanah and Yom Kippur when Hashem is considered to be closer and more accessible to His creations and their prayers are more easily accepted before Hashem. The Rekanati (Bereshit 22) writes that without these days, the path to acceptance of our prayers would surely be much more far removed from us, for the prosecuting angels created from one's sins are almost always present and they prevent one's prayers from being willingly accepted by Hashem. However, during these days when one's prayers reach infinitely closer to Hashem and are more willingly accepted, one shall merit that his prayers be accepted during these days. One must therefore undertake the awesome responsibility of concentrating on every prayer during these Days of Awe and not to lose even one of them, for each one's reward is priceless.