The wings - If I should flee from east to west: for the sea being the western border of Canaan, is often put for the west in scripture. And wings are poetically ascribed to the morning here, as they are elsewhere to the sun, and to the winds.
Imperfect - When I was first conceived. Book - In thy counsel and providence, by which thou didst contrive and effect this great work, according to that model which thou hadst appointed.
Thoughts - Thy counsels on my behalf. Thou didst not only form me at first, but ever since my conception and birth, thy thoughts have been employed for me.