From Death to Life
A sinner is not always aware of the time when he crossed from death to life. What initially seemed to be preparation may later prove to have been salvation. The regenerating work of the Spirit is a mystery; we must acknowledge that the wind blows where it pleases and we do not see it (John 3:8).
Joel R. Beeke and Mark Jones, A Puritan Theology: Doctrine for Life (Grand Rapids, MI: Reformation Heritage Books, 2012), 450.