The Sufis distinguish between Qaza or destined occurrences, and Qadar or happenings which are impulsive or ‘accidental’. The Avatar’s or Qutub’s actions are impulsive and arise from their infinite compassion; and the functioning of this whim relieves and gives beauty and charm to what would otherwise be a rigid determinism.
The Qutub’s actions bring about modifications in the previously determined divine Plan, but they are limited in extent. But the Avatar’s interventions bring about modifications on a universal scale. For instance, supposing that it was divinely ordained for a war to occur in 1950. It must take place at the appointed time, and the train of events which follows will punctually meet the present time-table. However, if the Avatar is in the world at the time He might, in His exercise of Qadar, ward off the catastrophe by some particular action on the gross plane. And so in the relentless working out of the laws of Nature there can enter the inexplicable divine caprice, spelling out peace instead of war in the diary of man.
-The Everything and the Nothing, p106