Bobby Grow, with Ron Frost on Richard Sibbes vs. William Perkins:
"Sibbes’ emphasis on the immediacy of the Spirit, instead of promoting an incipient Pietism, allows the person to be obsessed and consumed by the beauty and majesty of Christ. This approach emphasizes a Trinitarian approach to salvation, which has a high pneumatology, leading to an even higher Christology — as the person of Christ and his works are magnified in the bride/bridegroom relationship, between Christ and his Church."
To see what this looks like get a copy of Richard Sibbes - Glorious Freedom: The Excellency of the Gospel over the Law.
Frost writes: "Christ’s communion with a believer is in some sense perceptible. Such experiences of communion, generally regarded as spontaneous increases of affection for Christ, transcend the law as a guide for behavior. As in marriage, the mutual commitment of love, rather than rule-driven behaviors, was seen to be the point of spiritual union. The Christian’s behavior is increasingly shaped by a devotion to Christ as accomplished by the Spirit...."