You may use the artwork in any way that is outlined in the Terms of Service, or not prohibited therein. Typically, churches and organizations may use the artwork for anything except as the "logo / brand" for the organization. You may obtain these permissions from the original creator.
Typically churches will use the artwork for:
- websites, blogs, emails.
- bulletins, brochures, bulletin boards, internal church print matter.
- overhead media such as worship lyrics, sermon outlines, dramatic performances.
When in doubt it is always a good idea to check with the artist on possible copyright issues.