…and every tongue that shall rise against thee in judgment thou shalt condemn. This is the heritage of the servants of the LORD, and their righteousness is of me, saith the LORD. – Isaiah 54:17

I wish to make this a personal heritage of each child of God-“every tongue that shall rise against you in judgment, you shall condemn.” O! what a sweet thought that is for me, for there are many tongues busy about me. Some say, “He is a good man;” others say, “He is deceiving the people.” Well, if God will convert more sinners, and bring more to His church, they may decide which way they like. I am not careful to answer any of the self-taught infallible in this matter. You never knew of a preacher who gathers a crowd, or who is doing any good, but he is sure to be slandered, and vilified, and so on; but here is a promise-“Every tongue that shall rise against thee in judgment, thou shalt condemn.” We can afford a little slander, because we know we shall have all the more to condemn. The more accusers, the more acquittals; the more slander, so much the more honor of God: so the enemy may just slander still for what we care; for “every tongue that shall rise against us in judgment we shall condemn.”

Do not be afraid to argue for the truth… Stand up for the truth; and there is so much solid learning and real truth to be found in the doctrines that we uphold, that none of you need be ashamed of them. They are mighty and must prevail. The mighty God of Jacob, by the demonstration of the Holy Ghost, makes them triumphant! ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2908.cfm