Wight

Webster's Dictionary

(1): ( n.) A human being; a person, either male or female; - now used chiefly in irony or burlesque, or in humorous language.

(2): ( n.) Weight.

(3): ( n.) A whit; a bit; a jot.

(4): ( n.) A supernatural being.

(5): ( a.) Swift; nimble; agile; strong and active.

King James Dictionary

Wight, n. g., a living being. L., to live. A being a person. It is obsolete, except in irony or burlesque. See Aught.

The wight of all the world who lovd thee best.

Wight, a. Swift nimble. This seems to be a dialectical form of quick.