St. John Climacus (579 - 649)

Also known as John of the Ladder, John Scholasticus and John Sinaites, was a 6th-7th-century Christian monk at the monastery on Mount Sinai. He is revered as a saint by the Roman Catholic, Eastern Orthodox and Eastern Catholic churches. Of John's literary output we know only the Κλῖμαξ (Latin: Scala Paradisi) or Ladder of Divine Ascent, composed in the early seventh century at the request of John, Abbot of Raithu, a monastery situated on the shores of the Red Sea, and a shorter work To the Pastor (Latin: Liber ad Pastorem), most likely a sort of appendix to the Ladder. It is in the Ladder' that we hear of the ascetic practice of carrying a small notebook to record the thoughts of the monk during contemplation.

The Ladder describes how to raise one's soul and body to God through the acquisition of ascetic virtues. Climacus uses the analogy of Jacob's Ladder as the framework for his spiritual teaching. Each chapter is referred to as a "step", and deals with a separate spiritual subject. There are thirty Steps of the ladder, which correspond to the age of Jesus at his baptism and the beginning of his earthly ministry. Within the general framework of a 'ladder', Climacus' book falls into three sections. The first seven Steps concern general virtues necessary for the ascetic life, while the next nineteen (Steps 8–26) give instruction on overcoming vices and building their corresponding virtues. The final four Steps concern the higher virtues toward which the ascetic life aims. The final rung of the ladder—beyond prayer (προσευχή), stillness (ἡσυχία), and even dispassion (ἀπάθεια)—is love (ἀγάπη).