# my words

"what I say" or "what I teach"

# of him will the Son of Man be ashamed

"the Son of Man will also be ashamed of him"

# the Son of Man ... when he comes in his own glory

Jesus was speaking about himself. Alternate translation: "I, the Son of Man ... when I come in my own glory" 

# the Father

This refers to God the Father. It is best to translate “Father” with the same word that your language uses to refer to a human father.