I like this analysis by Margaret Fuller:

There are two modes of criticism. One which … crushes to earth without mercy all the humble buds of Phantasy, all the plants that, though green and fruitful, are also a prey to insects or have suffered by drouth. It weeds well the garden, and cannot believe the weed in its native soil may be a pretty, graceful plant.

There is another mode which enters into the natural history of every thing that breathes and lives, which believes no impulse to be entirely in vain, which scrutinizes circumstances, motive and object before it condemns, and believes there is a beauty in natural form, if its law and purpose be understood.

Wikipedia says this is from “Poets of the People” in Art, Literature and the Drama (1858). Although she says criticism is the mode, I see security.