The Idolatry of Rationalism

The Manicheans did no idols make
Without themselves, nor worship gods of wood,
Yet idols did in their Ideas take,
And figured Christ as on the cross he stood.
Thus did they when they earnestly did pray
Till clearer Faith this idol took away.

We seem more inwardly to know the Son
And see our own salvation in his blood
When this is said, we think the work is done
And with the Father hold our portion good,
As if true life within these words were laid
For him that in life never words obeyed.

If this be safe, it is a pleasant way,
The Cross of Christ is very easily borne;
But six days' labour makes the sabbath day,
The flesh is dead before grace can be born,
The heart must first bear witness with the book,
The earth must burn, ere we for Christ can look.

--Sonnet 89, from Caelica, by Lord Brooke Fulke Greville (1554-1628)