The theology of the Keswick Convention at the time was that of the Holiness movement with its idea, originally derived from Methodism, of the second work of grace which would allow "entire sanctification": Christians living "in close union with Christ" could remain" free from sin" through the Holy Spirit. That is when Buchman's assertion (bizaare to many Lutheran or Reformed ears) that "human nature can change" originates. "Absolute moral standards belong by Holiness" even though the formula used by Buchman had been formulated by the American Presbyterian missionary Robert Elliott Speer. Frank Buchman was also very influenced by Presbyterian Yale professor Henry Burt Wright (see "The Four Absolutes" infra).