en_tn_condensed/amo/04/13.md

he who forms the mountains ... reveals his thoughts ... is his name

It is not clear whether Amos is speaking about God, or God is speaking about himself.

makes the dawn become darkness

"makes the morning dark"

treads on the high places of the earth

"walks on the high places of the earth" or "and marches on the high places of the earth"

Yahweh, God of hosts, is his name

By declaring his full name, Yahweh is declaring his power and authority to do these things.