The Author of the following pages is a plain man, who has endeavoured to write a plain book, for the purpose of being popularly useful. The philosophical form which his enquiries have assumed, is the result rather of accidental circumstances than of free choice. The strong desire which he felt in his earlier years to benefit the Young, induced him to push forward in the paths which appeared to him most likely to lead to his object; and it was not till he had advanced far into the fields of
