That by a miracle man might live again, was a question of faith and not of understanding.

I left faith to religion, and banished it from philosophy.

How define with a precision to satisfy the logic of philosophy what was to live again?
The body?
We know that the body rests in its grave till by the process of decomposition its elemental parts enter into other forms of matter.

The mind?
But the mind was as clearly the result of the bodily organization as the music of the harpsichord is the result of the instrumental mechanism.

The mind shared the decrepitude of the body in extreme old age, and in the full vigour of youth a sudden injury to the brain might forever destroy the intellect of a Plato or a Shakspeare.
But the third principle,--the soul,--the something lodged within the body, which yet was to survive it?
Where was that soul hidden out of the ken of the anatomist?
When philosophers attempted to define it, were they not compelled to confound its nature and its actions with those of the mind?
Could they reduce it to the mere moral sense, varying according to education, circumstances, and physical constitution?
But even the moral sense in the most virtuous of men may be swept away by a fever.