LEV920 Bring the omer offering of barley. We should reflect upon the great kindness that Hashem does for His creations by providing them new crops of grain for food every year. Before we take benefit from the new grain, it is fitting that we bring it an offering to Hashem, so that we recall His exceeding goodness and kindness. Through the act of bringing the offering with the proper thoughts, Hashem will consider us worthy and will bless us and our grain because He desires our wellbeing and wants to bestow good upon us. As to the reason that the barley offering is brought on the second day of Pesach not the first, we do not mix one joy with another. The first day of Pesach is for happily recalling the great miracles that Hashem did for us when He took us out of Egypt, delivering us from bondage into freedom and from suffering into joy