If the sorrow is occasioned by other people, we have to suffer it with joy, and pray for those who have saddened us, as I said before, bearing in mind that whatever befalls us does so with God’s sanction.
Whatever the Lord sends us, He does only for the benefit and salvation of our soul.
It may be that, in the beginning, it doesn’t seem to bring us any benefit, but later we’ll realize that what God has allowed us to go through has been better for us than what we ourselves would have wanted to happen.
So we shouldn’t think in human terms, but should believe with certainty that the unsleeping eye of God sees all things and that nothing happens without His will.
It’s from the wealth of His mercy that these situations and temptations happen to us, so that we can earn our heavenly reward through our patience.
Because without temptations, no-one has ever been crowned.
This is why we should offer glory to God for everything, because He is our Dispenser and Saviour, as Saint Isaac the Syrian says: “The mouth that glorifies God is acceptable to God, and grace dwells in the heart which thanks God from its depths”.
Besides, we should avoid complaints and judgements against those who’ve saddened us and should pray for them, as the same saint says: God puts up with all the weaknesses that people have, but those who continually censure other people won’t go without correction.
Though we must have the soul-saving sorrow over the sins we commit, with hope in our repentance to God and in the knowledge that there’s no sin which defeats God’s love for us, since He forgives everyone who repents sincerely and prays to Him.
This sorrow is linked to joy (joyful sadness) and kindles in people the desire for everything spiritual and gives them patience in their trials. “For godly grief produces a repentance that leads to salvation without regret, whereas worldly grief produces death”, says Saint Paul (2 Cor. 7, 10).
So we should seek godly sorrow, because it brings internal repose, whereas the grief that proceeds from Satan should be expelled from our hearts, together with all the other passions, through prayer, the study of sacred texts and the receiving of Holy Communion.
Grief which is not from God and for the love of God is the cause of all evils, and, unless we free ourselves from it, despair will overcome us and our soul will be devoid of grace, overwhelmed with sloth and won’t even want to pray or read our sacred books.
Nil Sorsky (Russian Orthodox; c. 1433–1508): The Passions of Avarice, Anger, Sorrow and Sloth @ Pemptousia.