Said the Soul - I still have a small place for a question, why do we need to say that everything is dependent on this Singularity? Is the first explanation that I heard from you at the beginning of your words better, that the Holy One blessed is he wanted to bestow complete goodness upon his creations, and saw that it was need for this that they receive it through merit and not in charity, therefore he placed reward and punishment in the world, in order that they received the goodness through their merit, and in contrast to this he only placed free choice in order to give space for reward and punishment:
Why Does Everything Hinge on God's Singularity
Da'at Tevunot 43:1