You are fighting battles. You are a warrior, even if you’ve laid down your weapons or surrendered in weariness, you can pick them back up and fight. And you won’t be alone. The Holy Spirit is your helper, your Paraclete- this means that He fights right next to you, back to back, protecting you. You have The Lord and all His wisdom in and with you. And you know that Christ has saved you from death.
The Lord knows you get tired. We have David for an example, he was so so so weary - and he poured out his frustration to God, and God faithfully renewed David’s strength and called him a man after God’s own heart. Pour out your heart to God and let Him renew your strength.
“The Lord is with you, mighty warrior.” Judges 6:12