Dangers in contemplative forms of prayer
Danger can arise if we practice the more extreme forms of physical control found in some forms of contemplative prayer. A gentle attention to the breath is not a danger, but more intensive forms of control of the breath or the beating of the heart can interfere with these functions and cause damage. Such practices should be avoided unless one has a competent guide.
Another form of danger occurs if we let our mind go blank, rather than focusing on the Lord. Such a condition can open us to demonic suggestion.
Sometimes people try to practice contemplative forms of prayer, but in fact they only daydream. Instead of an alert concentration on God, they simply let their minds roam among various thoughts and feelings, with perhaps a vague sense of God in the background. Such woolgathering is not the Prayer of the Heart and can have the negative effect of making us more vague and fuzzy in the rest of our life.
Since contemplative forms of prayer can be disturbing or even dangerous, it is often recommended that we have a spiritual director, or at least a close friend who is sympathetic with such prayer with whom to share something of what we are experiencing. However, if we avoid excessive interference with our breathing and heartbeat, and if we focus on the Lord, asking for His guidance and protection, there need be no danger. The regular reading of Scripture and participation in Christian community, especially worship, are further safeguards.
Along with these practical dangers there are also potential theological dangers. Those who seek to simply attend to God’s Presence as such, with no thoughts of any sort, are practicing an ancient and valuable form of Christian prayer, but such prayer can run the risk of seeking a God beyond God, like some of the ancient Gnostics, and denying the Incarnation. We can guard against this danger by putting our contemplative prayer in the context of lectio divina, the meditative reading of Scripture.
Similarly, such forms of prayer can promote unmediated God-mysticism. The focus of the New Testament, however, is the Presence of God mediated to us in Jesus, the divine/human Son. Indeed, St. John seems to consciously reject unmediated God-mysticism, insisting that no one has seen God apart from Christ (e.g., John 1.18). The writings of John Main contain much help in understanding the role of Christ and the Holy Spirit in contemplative prayer.