in all My holy mountain. This expression occurs in the "former" portion only here and Isa_27:13, and in the "latter "portion in Isa_56:7; Isa_57:13; Isa_65:25. It is to be distinguished from other expressions in which the word "mountain" occurs.
shall be = shall assuredly become.
the knowledge. This is the sign of the fulness of blessing. See note on Isa_1:3; Compare Isa_6:3. Reference to Pentateuch (Num_14:21). App-92.