Radak: When He spoke to me, the Ru'ach came to me and strengthened me and stood me on my legs.

Malbim: After his senses and powers were Batel when he fell on his face, he merely heard the voice, but could not understand. Therefore, the Ru'ach strengthened him and stood him on his legs. Then, he heard and understood.

Rashi: This means Misdaber ¹ It is honorable to write so about the Shechinah; it talks by itself, and His messengers hear (as opposed to Medaber, which is speaking face to face).