God opens doors no man can shut. That means even if someone doesn’t like you, even if they do their best to discredit you, they may try to close the door, but you can stay in peace knowing that they don’t have the final say.
There are certain doors God has already ordained to open of their own accord. People can’t stop them. Here’s the key: You and God are a majority. What He has destined for your life will override anyone or anything trying to stop you. Even if someone is against you, they can’t keep you from getting to where you’re supposed to be.