In his incredible lecture on “The Preacher’s Private Prayer” Spurgeon remarked,

It is said of Alleine, ‘He poured out his very heart in prayer and preaching. His supplications and his exhortations were so affectionate, so full of holy zeal, life and vigour, that they quite overcame his hearers; he melted over them, so that he thawed and mollified, and sometimes dissolved the hardest hearts.’

– Spurgeon, Lectures to My Students, 45.