Lectures which really teach will never be popular; lectures which are popular will never really teach.

All are sure in their days except the most wise ... He is the wisest philosopher who holds his theory with some doubt.

Why will people go astray when they have this blessed Book to guide them?

It is on record that when a young aspirant asked Faraday the secret of his success as a scientific investigator, he replied, 'The secret is comprised in three words- Work, Finish, Publish.'

When I came to know Mrs. Marcet personally; how often I cast my thoughts backward, delighting to connect the past and the present; how often, when sending a paper to her as a thank you offering, I thought of my first instructress.

But still try, for who knows what is possible?

I will simply express my strong belief, that that point of self-education which consists in teaching the mind to resist its desires and inclinations, until they are proved to be right, is the most important of all, not only in things of natural philosophy, but in every department of dally life.