Salam loli,
I'm not an expert. ...I don't even know how to use the concordance p (and forgive me if i sounded too formal here)
But here are some pointers
- 379 and 39/10 & 39/53 -->> They do NOT contradict each other.
Take a look at these verses again...
379 It was not to a human that God gives him The Book and the judgment/rule and the prophethood then he says to the people "Be/become worshippers/slaves to me, from other than God". And but "Be knowledgeable Lord worshippers with what you were teaching The Book and with what you were studying ".
3910 Say "You my worshippers/slaves those who believed, fear and obey your Lord, to those who did good in this the present world (is) a goodness/beauty, and God's earth/Planet Earth/land (is) spread/abundant , truly the patient are fulfilled/completed their reward without (an) account/calculation."
3953 Say "You my worshippers/slaves those who neglected/ignored on themselves, do not despair from God's mercy, that truly God forgives the crimes all/all together, that truly He is the forgiving, the merciful."
As you see,
"BE my worshipers" =/= "my worshipers"
The first sentence is a command/suggestion, while the second sentence merely acknowledged the situation.
An example, hmm, American Idol, Jordin Spark. Jordin Spark was just doing her thing on stage, and zap! Many began to make her their idol. Did Jordin stand on the stage and said, "Make me your idol" ..? No, she did not.
Now, let's say Jordin one day decided to follow the Quran. . .. what does the quran tell her to say? And, secondly, why do you think the quran tell her to say, "..." and, thirdly, what might be the consequences/impact after Jordin says "..." ? D
- As to your question, to whom 39/10 & 39/53 are addressed to,
The answer is right in the verses. "You, my worshipers/slaves"
.... The Quran is for all time, for everyone.
- Please see the verses after those that you have posted... 39/11, 39/12 ; 39/54, 39/55... I believe these verses are also what God tells us to "say "...." besides 39/10 and 39/53...
Meaning, there's more to say ".."
- I'm not sure about this aspect... but, aren't the quranic verses do not have punctuations such as comma and quotations?
salam, hope this helps.