Baruch She'amar – the blessing with which we introduce the Pesukeh De'zimra section of the morning prayer service – begins with a series of phrases that open with the word "Baruch," praising G-d for various qualities. First, we praise Him for pronouncing that the world should come into existence ("Baruch She'amar Ve'haya Ha'olam"). Later, we praise Him for His compassion on the world's inhabitants ("Baruch Merahem Al Ha'beriyot"). There is, however, one phrase in this series which requires some explanation: "Baruch Gozer U'mekayem" – "Blessed is He who decrees and fulfills [the decrees]." It seems that we praise Hashem for carrying out His decrees – even when He issues harsh decrees against someone. We must ask why we give praise to Hashem for this quality. Should we rejoice over G-d's carrying out decrees of punishment? One explanation is that the word "Mekayem" in this phrase refers not to the fulfillment of the decrees, but rather to G-d's sustaining the individual. We give praise to Hashem for the fact that even when He issues a harsh decree against somebody, and brings upon him some sort of hardship or crisis, He is "Mekayem" – He holds the person by the hand, helping him get through this difficult ordeal. Whenever Hashem presents a person with a challenge, He equips him with the strength to overcome the challenge, to past the test that he now faces. We are assured that no matter what we are dealing with, Hashem is "Mekayem" – He is helping us get through it. We thus praise Hashem for mercifully helping people even when they are deserving of hardship, by holding their hand and giving them the strength, fortitude and capabilities they need to persevere.