In Smith Justice Scalia Resurrected Reynolds from the Grave

 Notice on p. 1864-1865 Scalia revives the long discarded belief vs conduct distinction--free exercise protects "first and foremost the right to believe and profess" religious doctrine, but not so much religiously-motivated conduct such as "assembling with others for worship service [!], [or] participating in sacramental use of bread and wine."

Then on page 1869 he plays the anarchy card by suggesting that protection of reliogious exercise creates "a system in which each conscience is a law unto itself." 

 Scalia used to love to say "the Constitution says what it says and it doesn't say what it doesn't say," Well, the First Amendment protects exercise, and to adopt a Scalian tone, "exercise means exercise."