Our Reason must unto our Faith Submit

Lord, I have search'd my heart, but do still doubt
It is not pure enough, not clean throughout,
Nor can be, till the Holy Ghost comes in,
And do assist in casting out of sin;
That so he may possession take for thee,
And I may hold my heart in Fealty,
To pay my God a thousand Thanks a day,
While thus thy Holy Spirit does bear sway.
O Holy Ghost! when thou art once possess'd,
I shall not dare disturb so bless'd a Guest
With a vile act, or a vain thought that may
Lessen my Bliss, and drive my God away.
Thy presence will my wavering heart direct
To Heaven, and will from Enemies protect
My Soul and me, while thou art my defence.
Who dares contest with thy Omnipotence!
So cleans'd, and so inform'd, I shall soon learn
To worship thee aright, and shall discern
The Mystery of Faith; my Reason teach
How to submit to what it cannot reach.
Faith shall take place, my Fancy shall retire;
And I will be contented to admire
The mighty Secrets of thy glorious Throne,
Which thou reserv'st unto thy self alone.
Lord, tho' my heart can never understand
The manner nor the motion of thy hand,
Nor all my Zeal and Fancy raise a thought
To comprehend thy Essence as I ought:
I can persuade my Reason to give way
Unto my Faith; for if thy Gospel say
'Tis so, it is enough; I do believe,
Tho' wonder how a Virgin did conceive,
And bring a Son who was both God and Man;
And do not doubt thy holy Spirit can
Dwell in my heart, and teach me to prevent
Doubting that Christ is in the Sacrament,
Or searching of thy high Divinity,
How the Godhead becomes a Trinity.
I can see thee now in the Creation,
Full as great as in the Resurrection:
Though I know not how all these come to pass,
Thy Word says so it is, and so it was;
And I believe't; while thou art mine, my Faith
No curiosity nor doubting hath.