The conversations were miles beyond Jo's comprehension, but she enjoyed it, though Kant and Hegel were unknown gods, the Subjective and Objective unintelligible terms, and the only thing 'evolved from her inner consciousness' was a bad headache after it was all over.

It dawned upon her gradually that the world was being picked to pieces, and put together on new and, according to the talkers, on infinitely better principles than before, that religion was in a fair way to be reasoned into nothingness, and intellect was to be the only God.

Jo knew nothing about philosophy or metaphysics of any sort, but a curious excitement, half pleasurable, half painful, came over her as she listened with a sense of being turned adrift into time and space, like a young balloon out on a holiday.
She looked round to see how the Professor liked it, and found him looking at her with the grimmest expression she had ever seen him wear.
He shook his head and beckoned her to come away, but she was fascinated just then by the freedom of Speculative Philosophy, and kept her seat, trying to find out what the wise gentlemen intended to rely upon after they had annihilated all the old beliefs.
Now, Mr.Bhaer was a diffident man and slow to offer his own opinions, not because they were unsettled, but too sincere and earnest to be lightly spoken.

As he glanced from Jo to several other young people, attracted by the brilliancy of the philosophic pyrotechnics, he knit his brows and longed to speak, fearing that some inflammable young soul would be led astray by the rockets, to find when the display was over that they had only an empty stick or a scorched hand.
He bore it as long as he could, but when he was appealed to for an opinion, he blazed up with honest indignation and defended religion with all the eloquence of truth--an eloquence which made his broken English musical and his plain face beautiful.

He had a hard fight, for the wise men argued well, but he didn't know when he was beaten and stood to his colors like a man.