There is something natural and healthy in our souls that St. Maximus the Confessor calls the “irascible aspect of the soul” and St. Basil the Great calls “temper” (at least in the English translations I am reading). This irascible aspect of the soul, or temper, when it is functioning in a healthy human being empowers the person do good and reject evil. One might even say it is something like zeal. However, in fallen, sinful human beings, temper is manifest as a passion called anger. Anger is a sort of mother passion, for from anger come passions such as irritability, impatience, frustration and sometimes even despair.
Christian life is a life of paradox. Love and fear live in the same heart. Heaven and hell are separated by a thin membrane, a flexible, moving membrane that is sometimes hard to see right away. And yet in all of this, God is merciful. God is loving. And God is saving us in and through and despite the messy and often painful realities we experience.