Hey there!
In the first lines of the poem "To a Mouse," Burns refers to the mouse he's referring to as small (wee), sly (sleekit), afraid, and cowardly (cow'rin and tim'rous). He then refers to the mouse as having a panic in its chest (panic's in thy breastie).
A paraphrase of these lines could be something like, "The mouse is described as a small, timid, and sly animal."
Hope this helped you out! :-)
