Mark the Ascetic - On the Spiritual Law 65-69

65. To accept an affliction for God's sake is a genuine act of holiness; for true love is tested by adversities.
66. Do not claim to have acquired virtue unless you have suffered affliction, for without affliction virtue has not been tested.
67. Consider the outcome of every involuntary affliction, and you will find it has been the destruction of sin.
68. Neighbors are very free with advice, but our own judgment is best.
69. If you want spiritual health, listen to your conscience, do all it tells you, and you will benefit.