ANSWER: Spiritual progress is no other than progress in regard to one’s state of mind. As and when a person goes on becoming more and more unselfish, he or she is progressing spiritually. It is selfishness that makes a person worldly-minded. Unselfishness brings a person closer to God because God is unselfishness itself. Also when a person is becoming more and more mentally calm and serene, less and less violent, more and more sympathetic to other people’s suffering, etc., he or she has been growing spiritually.
As wind removes the cloud, so the name of God destroys the cloud of worldliness.— Sri Sarada Devi