The knife represents Bob's trial to attack Atticus's children (Scout and Jem) at the end of the novel.
It can represent violence and bravery as a theme. And shows the setting (time of when it took place)
In literature, a bloody dagger can symbolize guilt, violence, betrayal, or a murderous act. It often represents a character's inner turmoil or the consequences of their actions. Shakespeare's "Macbeth" famously features a bloody dagger as a symbol of Macbeth's guilt and descent into madness.
There are a number of things that a knife could symbolize. Some of the common ones include survival, defense, lost love, sacrifice, cutting away and so much more.
The Knife Symbolizes power
The knife shows evil
Where is Macbeth going when he sees the bloody dagger?
A dagger tattoo symbolizes death.
A dagger tattoo symbolizes death.
He sees a dagger floating in the air in front of him. He concludes that it must be a "dagger of the mind", a hallucination.
A dagger and dragon tattoo can symbolize several different things. It can symbolize courage, strength, or perseverance for example. Tattoos are very personal, and each person has their own beliefs as to what their specific tattoo symbolizes.
After Macbeth sees the bloody dagger, he is headed to King Duncan's chamber to carry out the murder as he believes it is a sign from fate urging him to proceed with his plan.
Lady Macbeth takes the bloody dagger back to Duncan's room in order to frame the King's guards for his murder.
Where is Macbeth going when he sees the bloody dagger?
Love can be painful.
Where is Macbeth going when he sees the bloody dagger?
Lady Macbeth replaces the bloody dagger near King Duncan's chamber to incriminate the guards and divert suspicion away from her husband.
Now, to put it in perspective, this is from the 'is this a dagger' speech. So, Macbeth is hallucinating a bloody dagger. He can't touch it, so he realizes it's not real and, in the line above, says it's the thought of killing Duncan, (which is the "bloody business") that is making him see things.