God of truth - very God, as opposed to false gods; Hebrew, Amen: the very name of Messiah (2Co 1:20; Rev 3:14), faithful to His promises (Joh 1:17; Joh 6:32). Real, substantial, spiritual, eternal, as opposed to the shadowy types of the law.
sweareth, etc. - God alone shall be appealed to as God (Isa 19:18; Deu 6:13; Psa 63:11).
troubles - that is, sins, provocations [Lowth]. Rather, calamities caused by your sins; so far from these visiting you again, the very remembrance of them is “hid from Mine eyes” by the magnitude of the blessings I will confer on you (Isa 65:17, etc.). [Maurer].