Ezra Chapter 4.  Opposition + God = Overcomers
It was God's plan to have God's altar and Temple rebuilt as well as the walls. Because it's God's plan, he can make it happen. That doesn't mean you won't face opposition. Just know when you're doing the Lord's work there will be opposition and obstacles that sometimes slow down or stop the process temporarily. God allows opposition.
Opposition:
1. Reminds us it's not by our might nor by our power but by God's power (Zechariah 4:6).
2. Remind us to put our trust in God. (Proverbs 3:5-6).
3. Teaches us to be patient and helps us grow spiritually (Psalm 37:7).
So let us not be discouraged. Let's remember what 1st John 4:4 says that we are overcomers in Christ and greater is he who lives in us than he who is in this world.