This question is based on General Literary Appreciation.

'I have said too much unto a heart of stone,
And laid my honour too unchary on it',
There's something in me that reproves my fault,
But such a headstrong potent fault it is
That it but mocks reproof.'.

William Shakespeare: Twelfth Night
A heart of stone in the lines above is an example of

No. no! Do not blame the gods. Let no one blame the powers. My people, learn from my fall.
The powers would have failed if I did not let them use me. They knew my weakness: the weakness of a man easily moved to the defence of his tribe against others.'

O.Rotimi: The Gods are not to Blame.

The speaker in the passage is

'He says
The medicine gourds are filthy,
And the herb
Are drunk from unhygienic cups'

Okot p Bitek: Song of Lawino

The poet in the lines is saying that