Brochas Daf Daled amud beis

Ahshrei utilises both aleph-beis and the posuk "poseach es yadecha". The former signifies Torah which is comprised of the 22 letters; the latter physical maintenance. And the two go together because Torah is "mazon haNefesh" and lechem is "mazon haGuf" and we say "im ain kemach, ain Torah; v'im ain Torah, ain Kemach."

Michoel is greater than Gavriel. 

The former arrives at his destination in a single flight; the latter needs two hops. Michoel represents the element of water, which is Rachamim; Gavriel that of Aish which is Din.  Rachamim is greater than Din, and Gavriel is required to interrupt his journey, so that there should be more time for HKBH to exercise mercy.