Because of this love for God, souls on this fourth step of the ladder pursue Him “in the spirit of suffering for His sake”. (Dark Night Bk II, chapter 19,4) They do this because love makes “all burdensome and heavy things nearly nothing”.
They have their body under control and take little account of it. They want to give to God and are willing to set aside their own interests. This love for God is so intense; therefore, he will frequently visit the soul with spiritual delights, ennobling them to endure the suffering they experience. The soul is interiorly detached from everything and does not stop to rest in these delights.