Bruno possibly felt a similar attraction; for there is nothing in the temper of his mind to make us believe that he inclined seriously to the religious life of the cloister.
During his novitiate he came into conflict with the superiors of his convent for the first time.

It was proved against him that he had given away certain images of saints, keeping only the crucifix; also that he had told a comrade to lay aside a rhymed version of the Seven Joys of Mary, and to read the lives of the Fathers of the Church instead.

On these two evidences of insufficient piety, an accusation was prepared against him which might have led to serious results.

But the master of the novices preferred to destroy the document, retaining only a memorandum of the fact for future use in case of need.[84] Bruno, after this event, obeyed the cloistral discipline in quiet, and received priest's orders in 1572.
At this epoch of his life, when he had attained his twenty-fourth year, he visited several Dominican convents of the Neapolitan province, and entered with the want of prudence which was habitual to him into disputations on theology.

Some remarks he let fall on transubstantiation and the Divinity of Christ, exposed him to a suspicion of Arianism, a heresy at that time rife in southern Italy.