Guigo II, sometimes referred to as Guy, or by the moniker "the Angelic", was a Carthusian monk and the 9th prior of Grande Chartreuse monastery, from 1174 to 1180.
In 1173, he is called a "monk and procurator" in an agreement between the Grande Chartreuse and the nearby abbey of Chalais.
Around 1180, he opposed unsuccessfully the petition of king Henry II of England to have Guigo's successor as procurator, Hugh, to be sent to the newly founded Witham Charterhouse as prior.
Drawing from Jacob's vision in Genesis 28.12 of angels ascending and descending a ladder to God, bringing human prayers to heaven and God's answers to earth, Guigo wrote an account to explain how the ladder was meant for those in the cloister, seeking the contemplative life.
The fourth stage is when the prayer, in turn, points to the gift of quiet stillness in the presence of God, called contemplation.