Feelings are a funny thing in the spiritual life. On the one hand you have to pay close attention to them: the little angers and annoyances that arise in our heart remind us of our unreasonable expectations of the world and other people. Our little attractions to others remind us of our vocation to communion with one another, and ultimately, to God. When we're sad for no reason, it can teach us that our home is not here, but in heaven. When we're happy for no reason, it can be a foretaste of our eternal joy and beatitude with God.
On the other hand, sometimes proper ascesis and right effort is to ignore and disregard our feelings. On Sunday I was preaching, and I felt terrible. I was tired, and kept thinking that I was going either too fast or too slow. I didn't feel connected to the assembly, and found my text stale and repetitive. But my pastor said it was the best he had heard from me thus far.
I guess knowing when to listen to our feelings and when to ignore them is a work of discernment.