Isaiah 54:17 says, “‘No weapon formed against you shall prosper, and every tongue which rises against you in judgment you shall condemn. This is the heritage of the servants of the Lord, and their righteousness is from Me,’ says the Lord.”
One of the enemy's main tactics for discouragement is to bring spiritual fatigue and keep us from our appointed places of purpose and calling. He constantly condemns the righteous, pointing out our failures, fears, and shortcomings to diminish our confidence and trust in Christ, our salvation.
Your inheritance as a follower of Christ is to rise and condemn that voice, not be subjected to it. Remind the enemy that your right standing with God is not your doing but a gift from God.
It's time to pray.