How will Hashem make my feet like wild goats?
Radak: They will be fast like wild goats to chase my enemies.
Malbim: I will run quickly to Eretz Yisrael.
Why does it say "v'Al Bamosai Yadricheni"?
Radak: He helped me to trample on their backs and stomp them in my land. It is called Bamosai, for Yerushalayim is higher than all lands 1 .
Malbim: He will cause me to step on Har Tziyon and Eretz Yisrael, which is higher than all other lands
Kidushin 69b: The Beis ha'Mikdash is higher than the rest of Eretz Yisrael, and Eretz Yisrael is higher than all other lands.
What do we learn from "la'Menatze'ach bi'Nginosai"?
Rashi: The Levi who plays [an instrument] in the Beis ha'Mikdash - I will sing, and the Levi will make music to accompany my voice. La'Menatze'ach is like "va'Ya'amidu Es ha'Leviyim mi'Ben Esrim Shanah va'Ma'alah Lenatze'ach" (Ezra 3:8). Bi'Nginosai is an expression of Ne'imos (a sweet) voice, to raise and lower it.
Malbim: I will sing praises in front of Him in the Beis ha'Mikdash.