This text comes from The Complete Poetical Works of John Greenleaf Whittier, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
The soul itself its awful witness is.
Say not in evil doing, “No one sees,”
And so offend the conscious One within,
Whose ear can hear the silences of sin
Ere they find voice, whose eyes unsleeping see
The secret motions of iniquity.
Nor in thy folly say, “I am alone.”
For, seated in thy heart, as on a throne,
The ancient Judge and Witness liveth still,
To note thy act and thought; and as thy ill
Or good goes from thee, far beyond thy reach,
The solemn Doomsman’s seal is set on each.
Before the Ender comes, whose charioteer
Is swift or slow Disease, lay up each year
Thy harvests of well-doing, wealth that kings
Nor thieves can take away. When all the things
Thou callest thine, goods, pleasures, honors fall,
Thou in thy virtue shalt survive them all.
Heed how thou livest. Do no act by day
Which from the night shall drive thy peace away.
In months of sun so live that months of rain
Shall still be happy. Evermore restrain
Evil and cherish good, so shall there be
Another and a happier life for thee.