“The very first qualification for expository preaching is the recognition that we are guardians of a sacred ‘deposit’ of truth (1 Tim. 6:20; 2 Tim. 1:12-14), trustees of the gospel (1 Thess. 2:4), ‘stewards of the mysteries of God’ (1 Cor. 4:1,2 KJV).”
Stott, The Challenge of Preaching, p. 27