...it is certain that I am really distinct from my body, and can exist without it.

There is nothing so strange and so unbelievable that it has not been said by one philosopher or another.

Science is practical philosophy.

Even those who have the weakest souls could acquire absolute mastery over all their passions if we employed sufficient ingenuity in training and guiding them.

With me, everything turns into mathematics.

Situations in life often permit no delay; and when we cannot determine the course which is certainly best, we must follow the one which is probably the best. This frame of mind freed me also from the repentance and remorse commonly felt by those vacillating individuals who are always seeking as worthwhile things which they later judge to be bad.

At last I will devote myself sincerely and without reservation to the general demolition of my opinions.