"Jesus said to them, 'My time has not yet come, but your time is always here.'"
He was already a marked man. The Jewish authorities were very upset at Jesus and would have loved to see him "taken care of." His friends knew this. They also know that if more people saw what he could do (his acts of power!), they'd be believers too! So they encouraged him to go to Jerusalem for the Festival of Booths.
Jesus' reply was interesting. "My time has not yet come," he said. We've heard him say this before - to his mother in Cana at the wedding. Scholars have come to see this expression as alluding to Jesus' passion, death & resurrection, when all would see who he truly was.
But Jesus doesn't stop with that phrase alone. He continues by saying, "...but your time is always here." I'd never noticed that before. "Instead of trying to tell me what I should do," Jesus seems to be saying, "why don't YOU go and tell others about me?"
OUR TIME IS ALWAYS HERE. Wow. No wiggle room there. No uncertainty at all. Maybe instead of trying to plead, beg and manipulate God into changing this world, WE are called (by Him!) to make a difference in the lives of others around us... not on our own power, but in His name!