This is a section from chapter four of One Hundred years of Modernism by Fr. Bourmaud R.I.P.
" The intellect is the faculty of the true; it becomes false as soon
as it no longer desires to harmonize its thinking with reality. Wanting to
think without concern for truth is self-delusion. Wanting to nourish one’s
mind on dreams is building castles in the air. For this reason, striving to
unite the minds of men around an idea one knows to be false is far from
wisdom–it is the height of philosophical blindness.
These remarks are equally valid for faith in the word of God and for
theology. These disciplines are meant to bring us to the knowledge of
God, not to more or less grave misconceptions about Him or, worse yet,
to total ignorance of Him.
Ignorance of God is the first and greatest insult
one can offer to Him, as if God and His revelation were superfluities.
Thus religion, which joins man to God, depends first and foremost on
true knowledge of the true God. Moreover, any love which is not guided
by true faith is more than a misguided charity; it is quite simply false charity.
The first love is the love of truth, and to set out to love God without
accepting His Revelation is an offense against the truth of God.
From the realist perspective, then, the disciplines related to dogma
and religion cannot conceive of any alliance outside of truth, outside of
the being of things, outside of concrete facts and the being of God. Christian truth can in no way admit of a union that would abstract from the
true God and definite Revelation.
It does not admit of a fictitious reuniting of different churches by means of a treaty of non-aggression that
would leave in the shadow all elements of discord. Such an attitude would
be an insult to infidels and non-Catholics, considering them as incapable
of desiring the true and the good.
Such religious syncretism can only give
rise to pure skepticism, with no one believing anything at all. Syncretism
of this kind forgets that God is a jealous God who vomits from His mouth
the lukewarm and the indifferent (Apoc. 3:16). It forgets the First Commandment, which enjoins us to hate all false gods in order to love the one
true God with all our heart, with all our mind, and with all our strength.
There can therefore be no greater offense than doctrinal relativism."