Answer: Give up selfish desires.
To estimate something is to find the general point of something, example: rounding a number from 4.5 to 5
Answer: Alienation
According to Marx, alienation is the result of living a mechanistic lifestyle or essentially acting like a machine day in and day out, and consequentially being separated from your humanity. He argued that the worker looses their sense of desire and destiny when they are deprived of the right to choose their own actions.
I’m pretty sure it’s Abraham