I like how you used the analogy with gate being closed.
Gate being closed is for protection. To keep unwanted things out. Most time if you pull up and the gate is closed you’re mad because you have to get out to open it or just park on the side if the road or maybe sit a wait for someone else to open it.The blood of Jesus works to cover us from evil. When Satan tries to come against you and see that you are covered by blood he has to think twice if he wants to even fool with you. He has to put up a fight to get to you. So he’s either going to try you or flee from you, try you another time. Im covered and submerged in the blood of Jesus.