Nor does he seem to have cared to whom he made the dangerous confidence of his esoteric beliefs.
His public writings, presumably composed with a certain circumspection--since everybody knows the proverb _litera scripta manet_--contain such perilous stuff that--when we consider what their author may have let fall in unguarded conversation--we are prepared to credit the charges brought against him by Mocenigo.

For it must now be said that this man, 'induced by the obligation of his conscience and by order of his confessor,' denounced Bruno to the Inquisition on May 23, 1592.
When the two men, so entirely opposite in their natures, first came together, Bruno began to instruct his patron in the famous art of memory and mathematics.

At the same time he discoursed freely and copiously, according to his wont, upon his own philosophy.

Mocenigo took no interest in metaphysics, and was terrified by the audacity of Bruno's speculations.

It enraged him to find how meager was Bruno's vaunted method for acquiring and retaining knowledge without pains.