We have lost the fearless, confident boldness, the parrhesia, of the apostolic mind. We have lost, what my friend David Upshaw calls, "the apostolic swagger." The apostles believed that they had seen the mystery behind all things—past, present and future. They believed that they had come to the heart of the universe itself, to the very secret of creation and of human history. In such knowledge, they set out to inform the whole world, and indeed the principalities and powers throughout the cosmos. They gave their lives in the service of the revelation of Jesus Christ because they knew that the cosmos was bound up in Him, and thus that coming to believe in Him inevitably meant the release of the kingdom of the Triune God throughout the earth and the cosmos.
C. Baxter Kruger on "Confidence"