This article discusses the teaching of efficacious grace as embraced by Calvinists. The article focuses on the inward change that is necessarily worked supernaturally, the effect produced in the soul, and the sufficiency of Christ's work on behalf of those for whom he suffered.

What was the Amyraut controversy? This controversy is associated with teachings on universal grace that flared up in the Reformed churches of the seventeenth century. Nicole provides a brief survey of the major developments in this controversy and follows this up with a summary of the most important arguments advanced by both sides.