Ah, what a warning for a thoughtless man,

Could field or grove, could any spot of earth,

Show to his eye an image of the pangs

Which it hath witnessed,—render back an echo

Of the sad steps by which it hath been trod!

William Wordsworth (1770-1850): The Excursion. Book vi.

Ah, how unjust to Nature and himself

Is thoughtless, thankless, inconsistent man!

Edward Young (1684-1765): Night thoughts. Night ii. Line 112.