en_tn_condensed/isa/58/01.md

Lift up your voice like a ram's horn

This means shout loudly. Here "your" refers to Isaiah. (See: rc://en/ta/man/jit/figs-simile and rc://en/ta/man/jit/figs-you)

Confront my people with their rebellion, and the house of Jacob with their sins

These two phrases mean basically the same thing. Together they strengthen the urgency to confront Yahweh's people. (See: rc://en/ta/man/jit/figs-parallelism)