The promise of God's Word, the Bible - not our feelings - is our authority. The Christian lives by faith (trust) in the trustworthiness of God Himself and His Word.
This train diagram illustrates the relationship among:
Fact
God and His Word Faith
Our trust in God and His Word Feeling
The result of our faith and obedience
(John 14:21).
The train will run with or without the caboose. However, it would be useless to attempt to pull the train by the caboose.
In the same way, we as Christians do not depend on feelings or emotions, but we place our faith (trust) in the trustworthiness of God and the promises of His Word.