I found this today: some thoughts by Milton’s on free-will. From Paradise Lost, Book V, §519-543.
To whom the Angel. Son of Heav'n and Earth,
Attend: That thou art happie, owe to God;
That thou continu'st such, owe to thy self,
That is, to thy obedience; therein stand.
This was that caution giv'n thee; be advis'd.
God made thee perfet, not immutable;
And good he made thee, but to persevere
He left it in thy power, ordaind thy will
By nature free, not over-rul'd by Fate
Inextricable, or strict necessity;
Our voluntarie service he requires,
Not our necessitated, such with him
Findes no acceptance, nor can find, for how
Can hearts, not free, be tri'd whether they serve
Willing or no, who will but what they must
By Destinie, and can no other choose?
My self and all th' Angelic Host that stand
In sight of God enthron'd, our happie state
Hold, as you yours, while our obedience holds;
On other surety none; freely we serve.
Because wee freely love, as in our will
To love or not; in this we stand or fall:
And som are fall'n, to disobedience fall'n,
And so from Heav'n to deepest Hell; O fall
From what high state of bliss into what woe!
OF MAN’S first disobedience, and the fruit
Of that forbidden tree whose mortal taste
Brought death into the World, and all our woe,
With loss of Eden, till one greater Man
Restore us, and regain the blissful Seat, (5)
Sing, Heavenly Muse, that, on the secret top
Of Oreb, or of Sinai, didst inspire
That Shepherd who first taught the chosen seed
In the beginning how the heavens and earth
Rose out of Chaos: or, if Sion hill (10)
Delight thee more, and Siloa’s brook that flowed
Fast by the oracle of God, I thence
Invoke thy aid to my adventrous song,
That with no middle flight intends to soar
Above the Aonian mount, while it pursues (15)
Things unattempted yet in prose or rhyme.
And chiefly Thou, O Spirit, that dost prefer
Before all temples the upright heart and pure,
Instruct me, for Thou know’st; Thou from the first
Wast present, and, with mighty wings outspread, (20)
Dove-like sat’st brooding on the vast Abyss,
And mad’st it pregnant: what in me is dark
Illumine, what is low raise and support;
That, to the highth of this great argument,
I may assert Eternal Providence, (25)
And justify the ways of God to men.
— Taken from John Milton’s Paradise Lost, Book I. (http://www.bartleby.com/4/401.html)