Pierre Teilhard was a consistent personalist. In his youth he may well have experienced the 'fascination of the impersonal and generalized' and confu… - Henri de Lubac

In a non-transcendent society, the reduction of man to his "social relationships" will work inevitably to the prejudice of his personal interiority, and will beget a tyranny of some kind, however novel. Moreover, have we not already the right to think, short as is our experience of this sort of thing, that it provides our analysis with its first confirmation? When Marx's followers eventually become aware of this, they will have no longer any inclination to extol that "total revolution" that they suppose themselves to have achieved in human intelligence before implanting it in society. They will have no longer any inclination to sing of their deliverance from "metaphysical agony" and from the "obsession of God". They will have to return to "those accursed eternal questions", as Dostoievski called them.

[D]oes not the mutual love of two beings complete them both, and call forth in each of them higher and more irreducible qualities? That is, in proportion as this love tends the more to true unity, because it is more spiritualized, so are these qualities more fully, more strictly personal.

So he [Fernand Guimet] questioned that impoverished faith, which becomes mere religious sentiment, or an impulse without form, or even simple communitarian warmth, or, worse yet, slogans for action.