Note 172 — COMUS.
Reading edition
170. mine ear ... My best guide. Observe the juxtaposition of mine and my in these lines. Mine is frequent before a vowel, especially when the possessive adjective is not emphatic. In Shakespeare ‘mine’ is almost always found before “eye,” “ear,” etc., where no emphasis is intended (Abbott, § 237).
171. Methought, i.e. it seemed to me. In the verb ‘methinks’ me is the dative, and thinks is an impersonal verb (A.S. thincan, to appear), quite distinct from the causal verb ‘I think,’ which is from A.S. thencan, to make to appear.