According to teachings, jews and greeks were equal.
a. greek
c. christian
b. roman
d. jewish

I think that the best answer is: Christian.

Christians believe that all the people are equal: this includes Jews, Greeks, Romans and Germanic tribes: they can all convert and then would achieve salvation.

In Contrast, Jews believed that they were a chosen people.

1.  go out into nature and commune with the divine2.  experience real solitude to truly perceive nature3.  realize that individuals are meant to learn from nature and transcend it4.  think of nature as a symbol of the divine