• Author(s): John Piper
• Date published: October 23, 2019
• URL: https://www.desiringgod.org/articles/the-expulsive-power-of-a-new-affection
• Date accessed: October 24, 2019

This article is about Thomas Chalmers' most famous sermon/lecture of the same title. The main idea is that it is pointless to try and live righteously by killing sin through fear or arguing that worldliness is not worth it, unless we fill our hearts with a greater pleasure, namely, Christ. Piper uses an analogy of being given a sophisticated lab and being asked to efficiently remove the air from a beaker. Using some sort of pump to form a vacuum is one way, but is difficult and not sustainable, but filling the beaker with water is simple and lasting.

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