# be alert

"be watchful" or "be aware of what is happening"

# strong enough to escape all these things

Possible meanings are "strong enough to endure these things" or "able to avoid these things."

# these things that will take place

"these things that will happen." Jesus has just told them about terrible things that will happen, such as persecution, war, and captivity.

# to stand before the Son of Man

"to stand with confidence before the Son of Man." This probably refers to when the Son of Man judges everyone. A person who is not ready will be afraid of the Son of Man and will not stand with confidence.