When speaking of anger, the scripture uses descriptive terms that could equally be applied to the truths concerning fire. In doing so, the Bible makes a connection that can help believers gain a better understanding of the benefits or dangers of anger. According to scripture, anger can be kindled, a term used to describe the starting of a fire (Exodus 4:14; Numbers 11:1; Deuteronomy 32:22; Jeremiah 15:14), either a little (Psalm 2:12) or greatly (Numbers 11:10; 1 Samuel 11:6). The Bible also describes anger as waxing hot (Exodus 32:19), another connection to fire. These similarities are by divine design. As is true concerning fire, anger can be useful and productive, but it can also be destructive and harmful, especially when it gets out of control.
As we have seen, courage comes from a strength of heart. On the contrary, the Bible likens discouragement (the opposite of courage) to a melted heart (Joshua 2:11). In other words, discouragement takes place when a man’s heart loses strength. The Bible reveals that discouragement comes through various avenues of life. Men become discouraged because of “the way” (i.e., the circumstances of life) (Numbers 21:4). Discouragement also results from fear and unbelief (Deuteronomy 1:28) and the magnitude of a task (1 Chronicles 28:20). Ultimately, discouragement rears its ugly head as a result of a lack of faith in God and His word. Since discouragement and a lack of faith go hand in hand, a discouraged man cannot please God (Hebrews 11:6).