It happens sometimes that a man who is pure of heart will discern in himself, besides the happiness which brings peace to his own individual desires and affections, a quite special joy, springing from a source outside himself, which enfolds him in an immeasurable sense of well being. This is the flowing back into his own diminutive personality of the new glow of health which Christ through his Incarnation has infused into humanity as a whole: in him, souls are gladdened with a feeling of warmth, for now they can live in communion with one another. They see with amazement that the monstrous multitude of human kind forms but one heart and one soul, indistinguishable from the Heart and Soul of Christ. But if they are to share in this joy and this vision they must first of all have had the courage to break through the narrow confines of their individuality, depersonalize themselves, so to speak, in order to become centered in Christ.
Teilhard de Chardin, Writings in the Time of War, p. 111.