This commandment flew in the face of the Greek culture because, like ours, it glorified self-assertion and aggressiveness. The Greeks worshipped bodily perfection and "wisdom," as they called it, flaunting it before others as a basis on which a relationship would be conducted. Feeling better than, or being seen as better than, others was very important to people in the Greek world.
God commands us to be clothed with humility. Humility is pride's opposite, its antonym. We learn a great deal about humility when we just do the opposite of what the Bible teaches us about pride. Part of the key to understanding humility is in this short phrase "just do"—just do the opposite of pride. True humility is a choice. It is not something that comes naturally. We have to choose to do it.
Peter says that we must "be clothed with humility." We must put on humility just as we put on our clothes. Doing either of these activities is a choice. In this phrase, the apostle is reminiscing about Jesus at His last Passover, when He clothed Himself with an apron and knelt down before His disciples, including Peter, washing their feet as an example of His mind, His attitude, toward them (John 13:1-17). He girded himself and performed this lowly act. He had to put on, choose to practice, humility to do that.