Let us recall the significance of mysticism in the Christian life. It is nothing other than the blossoming of the life of grace. In essence, then, it is supernatural. All extraordinary manifestations [extraordinary phenomena] must be excluded from its definition. These latter, even when their authenticity is duly proven, do not make up the essence of mysticism, even if they are closely tied to it… In sum such is the nature of Christian mysticism: experience of God’s depths through the connaturality of love.
Georges Cardinal Cottier (1922–2016)