"Be ye angry, and sin not: ..." any honest assessment of justice, in regard to self, must come away agreeing that any lot or treatment up to and including Hell, is well within the bounds of what we deserve. This is precisely why our SAVIOR took our sin like a LAMB to the slaughter (cf. John 1:29). The Cross was not wrath gone amuck, but simply the gory demonstration of sin's just due. Indiscrete anger is the big brother of pride, and always ugly, because it defends sin. Biblically, indignant anger is sanctioned, so far as it is directed toward the defense of the Gospel and GOD'S glory (cf. John 2:13-17). Regarding others however, who have caused offense toward us, whether real or perceived, we are never more noble than when we defer anger; and never more like the LORD than when we pass over a transgression in forgiveness. "And be ye kind one to another, tenderhearted, forgiving one another, even as GOD for CHRIST'S sake hath forgiven you." Conversely, never are we more like Lucifer, than when we take matters into our own hands.
"And we know that all things work together for good to them that love GOD, to them who are the called according to HIS purpose." Joseph comes to my mind, as the Bible's consummate teacher emeritus in this, turning evil to good, regarding his brother's sins: "And Joseph said unto them, Fear not: for am I in the place of GOD? But as for you, ye thought evil against me; but GOD meant it unto good, to bring to pass, as it is this day, to save much people alive. Now therefore fear ye not: I will nourish you, and your little ones. And he comforted them, and spake kindly unto them."
Experience and knowledge are wonderful tools, but if filed improperly, they can boom-a-rang in a most indiscriminate way. When we catalogue in emotion or pride, the cabinet is found in anger's closet; where it is dim, dank, disorganized; and the atmosphere breeds upon itself like mold. "Neither give place to the devil." Beware, lest the Devil become your file clerk!
"... let not the sun go down upon your wrath"