# When you have lifted up

This refers to placing Jesus on the cross to kill him.

# lifted up the Son of Man

Jesus used the title "Son of Man" to refer to himself. Alternate translation: "lifted me, the Son of Man, up" 

# I AM

Possible meanings are 1) Jesus is identifying himself as Yahweh, who identified himself to Moses as "I AM," or 2) Jesus is saying, "I am the one I claim to be."

# As the Father taught me, I speak these things

"I am only saying what my Father taught me to say."