On the first day of Rosh Hashana we read of the desired model - inscription for good life by virtue of man's righteousness. However, not everyone merits; therefore, on the second day of Rosh Hashana the haftara emphasizes inscription for a good and peaceful life even if a person is unworthy.  The haftara for the first day teaches us what meritorious conduct is; the haftara for the second day offers us the consolation that even if we lack that conduct, God will treat us graciously and with compassion.