What does this saying mean; "Don't trust everything you see even salt looks like sugar"?

In robert fosters birches what does the speaker think of when he sees birches bend left and right

Describe how fraction strips can you order fraction

Seeing much of this joylessness, and inaptitude, both of body and mind, for a lot which would be full of blessings for those prepared for it, we could not but look with deep interest on the little girls, and hope they would grow up with the strength of body, dexterity, simple tastes, and resources that would fit them to enjoy and refine the western farmer's life. which best describes fuller's style in this passage?