Francisco de Osuna

Francisco of Osuna, O.F.M. (1492 or 1497 – c. 1540), was a Spanish Franciscan friar and author of some of the most influential works on spirituality in Spain in the 16th century.

His book ''The Third Spiritual Alphabet'' influenced Saint Teresa of Jesus. It is considered a masterpiece of Franciscan mysticism. His premise in the book is that friendship and communion with God are possible in this life through cleansing one's conscience, entering one's heart, resting in loving stillness, and then rising above the heart to God alone. Provided by Wikipedia