Children (nay, and men too) do most by example.

Any one reflecting upon the thought he has of the delight, which any present or absent thing is apt to produce in him, has the idea we call love.

All men are liable to error; and most men are, in many points, by passion or interest, under temptation to it.

The works of nature and the works of revelation display religion to mankind in characters so large and visible that those who are not quite blind may in them see and read the first principles and most necessary parts of it and from thence penet into those infinite depths filled with the treasures of wisdom and knowledge.

Revelation in matters where reason cannot judge, or but probably, ought to be hearkened to. First, Whatever proposition is revealed, of whose truth our mind, by its natural faculties and notions, cannot judge, that is purely matter of faith, and above reason.

If by gaining knowledge we destroy our health, we labour for a thing that will be useless in our hands.

In my opinion, understanding who your target audience is, and what they want, and writing to them (and only them!) is the most important component of being successful as an author.