To measure the length and size of things in order to compare them; to compare the power or scale of different things

to consider oneself and others so that everyone gets what they need; to use oneself as a measure for treating others with empathy and fairness

the way of treating others as one would wish to be treated; the Confucian principle of using one's own feelings as a guide for how to treat others

to compare relative lengths; to compare the merits and drawbacks of different options

to compare long and short; to weigh the advantages and disadvantages