# in the last days

"in the future"

# the mountain of the house of Yahweh

"Yahweh will establish the mountain on which his temple is built" 

# as the highest of the mountains

"the most important of the mountains" or "the most important place in the world" 

# it will be raised up above the hills

"Yahweh will honor the people who worship there more than he honors any other people" 

# all the nations

"people from all the nations" 

# will flow to it

"will flow like a river to it" or "will go to it"