Trust in others wins co-operation from them. To have faith in others also means reinforcing other people’s faith in themselves. This naturally increases their self-confidence and creates enthusiasm. Then they become better able to respond to positive feelings and access their full potential.
If I notice someone I work with is not co-operating with me I need to check my own faith in that person. When I am able to appreciate them for their own unique qualities, my faith in that person will grow.