I considered some points from this story(the greengrocer and the parrot) :

1- Men can be friends and help eachother without having to change themselves.they can be friends although they have several unequalities.

2-God should play the role of touchstone for us.he can differ between qualities of things like a touchstone that realize gold from other metals.in other words what God has asked us to do is the best factor.(line 280)

3-Putting a wrong label on somebody is betray.(line 91)

4-Words are like shell.the important thing about a word is it's origin(whether it is from God or not)that gives it atmosphere and meaning.(line 295)