Answer:
This quote means that just like it has been with friend, inconsistency came on him and he found out that it was as a result of his weak and fruitless attempts to be free from the habit of being so much disturbed and restless.
Explanation:
From the above, we will discover that the writer revealed that just like his friend, he discovered that all his attempts and struggles to stop being troubled and disturbed proved abortive.
Being dependable and considerate of other people’s feelings
Macbeth worries that he has killed Duncan more for Banquo's sake because Macbeth does not have any children to follow him as king like Banquo.