In that day I will raise up the tent of David who is fallen, and close up its breaches, and I will raise up its ruins, and I will build it as in the days of old;
It should be remembered that James here was not quoting Amos alone, attributing his quotations to "the prophets."  (Acts 15:15).  However, the words of Amos in this verse are definitely among the passages referred to, making it certain that this is a reference to the building up of the Church, the antitype of the tabernacle.  Note that there is no reference whatever here to the Jewish temple, itself an apostasy from the tabernacle; and, it is in the sense of that semi-pagan temple having supplanted and taken the place of the tabernacle that the "tabernacle" is here represented as "fallen," meaning that the Jews had simply discarded it and gone into the temple business.