Is attitude a choice of one's action or is it a manifistation of one's thought or feeling?

* It's about one's thoughts and feelings. Our attitudes change with whatever feelings (our feelings change constantly even through a given day). Example: If we are angry or frustrated about something we tend to show our feelings through our facial expressions and body language and if wise try to hold back on what we would really like to say to certain people that may annoy us. If we are happy then the world is a bowl of cherries and we feel 'up' almost on a high and therefore the world is right and we find ourselves smiling and being pleasant to people.