The mystery, which was kept secret since the world began.@Romans 16:25
Charles Wesley (1707-1788)

Charles Wesley (1707-1788), in The Un­pub­lished Po­e­try of Charles Wes­ley, by S. T. Kim­brough, Jr., & Ol­iv­er A. Beck­er­legge (Nash­ville, Ten­nes­see: Abing­don Press, 1992), pag­es 106-7.

Ac­cra, James Mc­Gran­a­han (1840-1907) (MIDI, NWC, PDF).

James McGranahan (1840-1907)

Stupendous mystery!
God in our flesh is seen
(While angels ask, how can it be?)
And dwells with sinful men!
Our nature He assumes,
That we may His retrieve;
He comes, to our dead world He comes,
That all thro’ Him may live.

The true, eternal Word
To us a Child is given,
The sovereign God, th’Almighty Lord,
Who fills both earth and Heaven;
Our God on earth appears
To take our sins away,
And guide us thro’ the vale of tears
To realms of endless day.