Wherever he goes in, say to the master of the house, 'The Teacher says, "Where is the guest room in which I may eat the Passover with My disciples?"'.
Then he will show you a large upper room, furnished and prepared, there make ready for us."
Mark 14:13-15 (NKJV)
When there is a problem, or you have a question, you need an answer. Knowing where to get the answer is always helpful, but what if your problem is concerning something you know about, and you already have the answer? For example, if I have a problem or question about a car, I will ask one of my brothers who know a lot about cars. I go to them with my problem or questions, but they don't ask me about car problems, because they usually already have those answers.
In Mark 14, we see Jesus sending two of His disciples to a city, and Jesus told them that they would meet a man with a pitcher of water who would take them to the place where they could prepare for the Passover. The place already existed, they just had to find that place, it was the answer that they needed. We know about Jesus and His disciples, but there are other people in the story: the man with the pitcher and the man in the house. They already knew about the house, they already had that answer.
So often in our lives, we only focus on finding answers rather than doing what is necessary so that we are the person who has the answer. We need to learn about everything that God has provided for us through Jesus, so that we will have answers for ourselves and answers to give to others. Rather than always just looking to find the answer we need, we can have the answer that someone needs. God can, and will, use us to help others, but first we have to have answers to give to them.