Adam Clarke on Psalms 65:5

By terrible things in righteousness - The Vulgate joins this clause to the preceding verse: "Thy holy temple is wonderful in right eousness: thou wilt hear us, O God of our salvation." But the psalmist may refer to those wonderful displays of God's providence in the change of seasons, and fertilization of the earth; and, consequently, in the sustenance of all animal beings.

The confidence of all the ends of the earth - Thou art the hope of thy people scattered through different parts of the world, and through the isles of the sea. This passage is also understood of the vocation of the Gentiles.