The poem criticizes idle and talkative people who only use words but no deeds.
In the first stanza, such people are compared to a garden full of weeds which is unfruitful and irritating. In the second stanza, their effect on others is like snow that blocks progress, or a bird huddled on a wall from the cold.
The third stanza says that when these talkative people's cowardice is revealed, they have no courage to face others, just as a lion at the door would crack open like a stick on one's back.
The final stanza describes how the hidden injuries caused by their sharp tongues are like penknives in people's hearts,