A true king has mercy on his subjects:[1]
[The idea that G-d’s great mercy which serves to affect the resurrection derives from a very high level of G-dliness seems paradoxical. After all, shouldn’t a higher level be more aloof and less in touch with the world and its creations. So, the explanation is as follows:] The level of great divine compassion derives specifically from a very high level of G-dliness. The reason for this is because it is specifically when one is very high and elevated above everyone else that he can feel compassion for everyone under him, as he fully comprehends their low state. This is similar to a king of flesh and blood who specifically is able to have compassion on his subjects, including his ministers and citizens, due to their very low and humble state of being in his eyes and in comparison to him, and hence his mercy is very great. So too it is regarding G-d, that everything is nullified in the face of the infinite light of G-d.
[1] Likkutei Torah Eikev “Vayachilcha es Haman” p. 13b