The Lord's "august design" in Natural Revelation

Below is an excerpt from William Cowper's poem, Hope. Cowper has been called the "apostle of nature" for reasons such as the below.

I can print the entire poem as a little booklet upon request. I think reading it is worth the effort required. As an example of the effort required, I had to do some research to find out who Cowper referred to as Leuconomus ("beneath well-sounding Greek I slur a name a poet must not speak"). Can anyone decipher the saint who Cowper is referring to???


The just Creator condescends to write,
In beams of inextinguishable light,
His names of wisdom, goodness, power, and love,
On all that blooms below, or shines above;
To catch the wandering notice of mankind,
And teach the world, if not perversely blind,
His gracious attributes, and prove the share
His offspring hold in his paternal care.
If, led from earthly things to things divine,
His creature thwart not his august design,
Then praise is heard instead of reasoning pride,
And captious cavil and complaint subside.
Nature, employ’d in her allotted place,
Is handmaid to the purposes of grace;
By good vouchsafed makes known superior good,
And bliss not seen by blessings understood:
That bliss, reveal’d in Scripture, with a glow
Bright as the covenant-insuring bow,
Fires all his feelings with a noble scorn
Of sensual evil, and thus Hope is born.

Hope sets the stamp of vanity on all
That men have deem’d substantial since the fall,
Yet has the wondrous virtue to educe
From emptiness itself a real use;
And while she takes, as at a father’s hand,
What health and sober appetite demand,
From fading good derives, with chemic art,
That lasting happiness, a thankful heart.
Hope, with uplifted foot, set free from earth,
Pants for the place of her ethereal birth,
On steady wings sails through the immense abyss,
Plucks amaranthine joys from bowers of bliss,
And crowns the soul, while yet a mourner here,
With wreaths like those triumphant spirits wear.
Hope, as an anchor, firm and sure, holds fast
The Christian vessel, and defies the blast.
Hope! nothing else can nourish and secure
His new-born virtues, and preserve him pure.
Hope! let the wretch, once conscious of the joy,
Whom now despairing agonies destroy,
Speak, for he can, and none so well as he,
What treasures centre, what delights, in thee.
Had he the gems, the spices, and the land,
That boasts the treasure, all at his command;
The fragrant grove, the inestimable mine,
Were light, when weigh’d against one smile of thine.