Assuming that your question refers to the poem I Hear America Singing by Walt Whitman, 1819-1892, in which the word singing is repeated, this influences the overall meaning by giving it rythm, making it gentle and beautiful,depicting the beautiness of a normal avergae day for most people in which they spontaneausly sing while their are working and doing their daily activities.
In Act IV, scene I, Macbeth tries to demonstrate his ambition to the witches.
<u>Explanation:</u>
Macbeth wishes to take up the throne and believes he would be the next king. In Act IV, scene I, Macbeth tries to demonstrate his ambition to the witches.
The witches show him who is going to be the next king through three prophecies. Through the sign of 'armed men', 'bloody child' and 'baby with a crown on the head' shows him that it was the sons of Banquo who was going to be the next king of Scotland.
With a mental state of ambition, Macbeth tries to plan a murder plot of Macduff's wide and children. Once an idea was sowed that Macbeth would become a king, ambitious gets him to attain it and push him to tragedy.
