Not only did Pierre Teilhard de Chardin speak about the work of the Holy Spirit in the human heart and see the Holy Spirit as the driving force of evolution, but the human union and community of persons joined by mutual love, in what he called the ‘noosphere’, was clearly analogous in his mind to the Trinitarian union of persons. Yet the Trinitarian dimension of Teilhard's writings has received little attention. On Teilhard's understanding, the Holy Spirit is the power through which evolution becomes the awakening of soul or spirit in matter, rather than being random variation and natural selection. It is also the Holy Spirit who promotes spiritual evolution in the human heart and opens human eyes to the divine presence in the world. Finally, Teilhard's concept of the ‘noosphere’ is analogous to that of the Trinity, understood as a personal unity where neither the individual person nor the Trinity as a whole would be complete without the other.
