What is the role of comparison

Comparison is sizing up to different objects, principles, literary, etc, anything that can come out of the blue as long as it includes two things being assessed together at the same time and being measured and judged which is better. This is good in keeping a person a reality check in having an alternative choice onto choosing things. This encourages a person to weigh things critically and submerge into the pros and cons and the possible consequences after the decision has been made.