Relevant Words of God:
If you only enjoy the grace of God, with a peaceful family life or material blessings, then you have not gained God, and your belief in God has failed. God has already carried out one stage of the work of grace in the flesh, and has already bestowed material blessings upon man—but man cannot be made perfect with grace, love, and mercy alone. In man’s experiences he encounters some of God’s love, and sees the love and mercy of God, yet having experienced for a period of time, he sees that God’s grace and His love and mercy are incapable of making man perfect, and incapable of revealing that which is corrupt within man, nor are they able to rid man of his corrupt disposition, or make perfect his love and faith. God’s work of grace was the work of one period, and man cannot rely on enjoying the grace of God in order to know God.
from “Only by Experiencing Painful Trials Can You Know the Loveliness of God” in The Word Appears in the Flesh