It's important to realize that Christianity has its own mystically inclined, ascetic and/or meditative practices. There may even be a shared lineage going back to the very time of Jesus, seeing as the Essenes drew significant inspiration from the Greek Cynics, and the Cynics in turn (like other Hellenistic philosophies) from early Eastern sources that are reflected today in Hinduism and Buddhism. Some Stoic ascetic practices were definitely taken up in early Christianity and are now valued in a Christian context as "spiritual exercises".