The answer
St. Basil the Great answers, “Grief according to God is when we grieve over the neglect or transgression of the commandment of God, as it is written: Grief has seized me because of sinners who forsake your law (Ps. 118:53), but it is grief according to the world when we are grieved over some aspect of human affairs or of those things which pertain to the world.”1467
Fr. Tadros Yacoub Malaty
Notes
1467 St. Basil of Caesarea, The Rule of St Basil in Latin and English: A Revised Critical Edition, trans., Anna M. Silvas (Collegeville, Minnesota: Liturgical Press, 2013) Q. 50: p. 153.