Web pages should not just be about text but also contain images. It is good to have at least one image per page to break up the text.
There are plenty of places to get images from - some of these are free, but some charge a small fee. The benefit of using one of these images is that they can also be used in church newsletters as well as your website.
Sources of images
http://www.istockphoto.com/ £7 each
http://en.fotolia.com/ £1.20 each
http://www.123rf.com/ £30 for 40 images
http://www.sxc.hu/ from FREE
WARNING: Do not take images from websites without permission including Google Images. These images may be copyrighted and by using them on your website you could be breaking the law. Images brought from the websites listed above can be used in church websites.