The controlling of our spirit evidently conveys a deeper meaning than simply holding our temper. The Bible often uses the word “spirit” to denote our dominant traits, our motives and disposition. This is true in the Biblical terms “mildness of spirit,” “quiet and mild spirit,” “faithful in spirit” and “haughty spirit.”​—1 Cor. 4:21; 1 Pet. 3:4; Prov. 11:13; 16:18.

For example, if a person has hatred in his heart but because of the lack of opportunity restrains himself from committing murder, has he really controlled his spirit? Is hatred all right so long as we do not give vent to it? Jesus answers, No! While condemning murder, his words also imply condemnation of the hateful spirit that can lead to it.​—See Matthew 5:21, 22.

ALL of us have a genetic makeup inherited from our imperfect parents, and this to some extent determines the kind of spirit we have. Also, our environment and background influence our personality to a large degree. Should we, then, just shrug off the matter by saying, “I can’t help the way I am”? This definitely is not the way the Bible directs us. Instead, we are encouraged to ‘make our mind over’ and “put on the new personality.” This means grappling with the “old personality” and getting rid of its wrong inclinations.​—Eph. 4:20-24; Rom. 12:2.