We must exert ourselves not only to reach maturity but also to maintain it. This requires that we avoid overconfidence. (1 Cor. 10:12) We should “keep testing” ourselves to make sure that we are continuing to make progress. In his letter to the Colossians, the apostle Paul again highlights the need to remain mature. Even though they had become full-grown Christians, Paul warned them against being ensnared by worldly thinking. (Col. 2:6-10) And Epaphras, who evidently knew those in the congregation well, prayed constantly that they might “finally stand complete,” or mature. (Col. 4:12) The point? Both Paul and Epaphras understood that maintaining maturity requires personal effort and God’s support. They wanted the Colossians to remain mature, or full-grown, Christians despite any challenges they were facing. w24.04 14:16-17

When we have cultivated proper fear of Jehovah, we love him so much that we would never do anything to displease him. We are eager to learn the difference between right and wrong, between truth and falsehood, so that we can gain Jehovah’s approval. (Prov. 2:3-6; Heb. 5:14) If we were to fear humans more than we fear God, we could be led away from the truth. Consider the example of the 12 chieftains who spied out the land that Jehovah had promised to give to the Israelites. For ten of the spies, their fear of the Canaanites was stronger than their love for Jehovah. They told their fellow Israelites: “We are not able to go up against the people, because they are stronger than we are.” (Num. 13:27-31) From a human standpoint, the Canaanites were stronger. That part was true. But to say that the Israelites would not be able to conquer their enemies left Jehovah out of the picture. w24.07 28:5-6

Do we have good reason for confidence regarding all of Jehovah’s judgments, both favorable and unfavorable? Yes! As Abraham understood so well, Jehovah is the perfect, all-wise, merciful “Judge of all the earth.” He has trained his Son and delegated all judging to him. (John 5:22) Both Father and Son can read what lies in each human heart. (Matt. 9:4) In every case, they will do “what is right”! Let us be determined to trust that Jehovah knows best. We recognize that we are not qualified to judge​—but he is! (Isa. 55:8, 9) So we confidently leave all the judging to him and his Son, the King who perfectly reflects his Father’s justice and mercy.​—Isa. 11:3, 4. w24.05 18:18-19