Jesus said in the Bible, "Love your neighbor as yourself".

If you really do it: love others as yourself. So,

You will be convinced that "all dharma circles are one me" Because you love others as yourself.

This is a biblical theory. Of course, it is also a Buddhist theory.

Someone asked: Why did Jesus save mankind?

Answer: Because Jesus regards human beings as his own children.

Someone asked: Why should the Buddha benefit all beings?

Answer: Because the Buddha regards all beings as the aggregation of karma.