In his book Good News For Anxious Christians: 10 Practical Things You Don’t Have to Do, the Christian philosopher Phillip Cary gives some examples of how our choices and habits affect our emotions.
“There is indeed a sense in which we are responsible for our emotions, though in a different way from our choices, because of course we don’t control our feelings in the direct way we control our choices. You can’t just choose not to be angry the way you choose not to raise your hand. Yet we are responsible for the virtues and vices we develop, which are what tend to produce various kinds of feelings. If we make a habit of gossiping, for instance, we will feed our resentment of other people, which will bear fruit in anger and ill will and eventually cruelty. Whereas if we practice moral disciplines like speaking courteously with people we dislike or being kind to people who annoy us, the emotional shape of our hearts will also change for the better. It takes time, but we can train our hearts to leave their resentments behind, to starve the poisonous feelings in them, while practicing and nurturing the better feelings–even if that practice begins with outward actions like speaking a kind word when we don’t really feel like it.”
Elsewhere he explains how good habits are a composite of emotions, perceptions, choices and thoughts.
“A virtue is a habit that includes all of these things: actions (you take care of your child even when you don’t feel like it), emotions (you are often overtaken by feelings of tenderness and delight), perceptions (you understand your little children better than they understand themselves), choices (you choose to get out of bed and go to the children’s room even when you’d much rather not), and thoughts (you think differently, more thoroughly and carefully, about your children than about anyone else in the world).”See Also