In his book, Joy Unspeakable: Power & Renewal in the Holy Spirit, published in 1984, but consisting of sermons preached in Westminster Chapel in 1964 and 1965, Lloyd-Jones declared that he "believed passionately in the baptism with the Holy Spirit as a distinct, post-conversion experience"; that all the gifts exist today; that the experience of the baptism with the Holy Spirit is the only thing "that holds out any hope for us today"; and that whoever denies the baptism with the Holy Spirit is guilty of quenching the Holy Spirit (Wheaton, IL: Harold Shaw Publishers, 1984, pp.13, 54, 278).
Kabilang sa mga pangunahing ministro at teologong ebanghelikal na malugod na umayon sa kilusang Pentecostal ay sina J.I. Packer at Martyn Lloyd-Jones. Sa kanyang aklat na may pamagat na “Joy Unspeakable: Power & Renewal in the Holy Spirit” – (Ito ay inilimbag noong 1984, ngunit ang nilalaman ay mga sermon niya na ipinangaral sa Westminster Chapel sa taong 1964 at 1965), sinabi ni Lloyd-Jones na siya ay “lubos na naniniwala sa bautismo sa Espiritu Santo bilang isang karanasang bukod at hiwalay sa muling kapanganakan.”