The essence of the world is money. Whenever you touch money you touch the world. The widow who dropped her mite into the temple treasury did something so acceptable to the Lord that she received from him special commendation. And Jesus approved. On every Roman denarius there was an image of Caesar.
Money is a thing of the world.
It is an essential part of the world system. In Old Testament times a rigid principle was laid down. In other words, there is no true devotion without destruction. Its destruction was the sign of its acceptance. When our Lord commended the widow for putting her two coins into the treasury, he observed that she had put in her bios, that is, her life.