Nachman of Breslov,
Likutei Etzot
“ For each person will attain according to his devotions, effort and toil that he toiled, strove and endured bitterness in this world for the sake of Hashem Yitbarakh. Even great Tzaddikim when they arrive in the Coming World at the perceptions attained in this world by a greater Tzaddik - they will be awesome matters for him, and they will be blaze and glow from them whilst for this Tzaddik that's greater than them it will be mere simple thing, for he attained these perceptions even in this world, so that which he attains in the Coming World - will be utterly huge. ”
