I know that our salvation is dependent on Christ alone, and not on how we feel, but it seems that God often uses feelings to help guide us. We have God's Word, the Bible, to guide our knowledge and feelings with regard to our faith.
Feelings range from way up to way down and some in between.
Does it mean that when we are feeling low, depressed, down in the dumps, that God loves us less, or that Jesus' merits for our salvation are a little bit or lots lower in truth or value. God's love and salvation remain the same. They never change. They never fibrillate or fail. They are rock solid forever.