There is among the passions an anger of the intellect, and this anger is in accordance with nature. Without anger a man cannot  attain purity: he has to feel angry with all that is sown in him by the enemy. When Job felt this anger he reviled his enemies, calling them “dishonorable men of no repute, lacking everything good, whom I would not consider fit to live with the dogs that guard my flocks’ (cf Job 30:1, 4. LXX). He who wishes to acquire the anger that is in accordance with nature must uproot all self-will, until he establishes within himself the state natural to the intellect.  –The Philokalia: St Isaiah the Solitary verse I

My eyes are spent with weeping; my soul is in tumult; my heart is poured out in grief because of the destruction of the daughter of my people, because infants and babes faint in the streets of the city. [12] They cry to their mothers, “Where is bread and wine?” as they faint like wounded men in the streets of the city, as their life is poured out on their mothers’ bosom. [13] What can I say for you, to what compare you, O daughter of Jerusalem? What can I liken to you, that I may comfort you, O virgin daughter of Zion? For vast as the sea is your ruin; who can restore you?  —Lamentations

St Isaiah the Solitary