Which Heinlein novel should i read first?

I have never read his books before, and i am finally able to correct this mistake.

Currently i have bought 'Stranger in a Strange Land' and 'The Moon is a Harsh Mistress' (both very good reviews), but as i've read that with this author's novels, it is sometimes important to read one book before the other, i'm asking you all just in case.
Which Heinlein novel should i read first

Just read a good line. The Chinese are Confucian when they succeed, but Taoist when they fail. Does that sum it up?
Moon is awesome.
Stranger is awesome.
But if I could only read one it would be Moon Is A Harsh Mistress.
It seems like I read that RAH considered Moon his best work but i could be wrong about that.
Aside from that, there is no reason (among these two books) to read them in any particular order.
Hope that helps.
Best Heinlein I've read, in my opinion, is "The Unpleasant Profession of Jonathan Hoeg", which is actually a novella, but it should be in a few collections etc.