Chasidut zu Bereschit 4:12

And the reason why he must fall from his level is this: because there are fallen souls; those that fell during the six days of Creation and those that fell in each and every generation. And they are reincarnated, and they are fugitive and wanderer (Gen. 4:12) and can not come to Blessed God because they have nothing through which to come; for in their life of life-force they engaged in this world’s vanities and achieved nothing. But when the tzaddik falls from his level and afterward rises as in the verse, seven times the tzaddik falls and stands (Proverbs 24:16), when he stands and rises up to Blessed God he lifts with him those souls we have mentioned. Now, he can only lift those souls who are from his root; and therefore every person must fall from his level in order to lift up the souls that are from his root, and understand this.