Quote by C. H. (Charles Haddon) Spurgeon
When you see a great deal of religion displayed in his shop window, you may depend on it, that he keeps a very small stock of it within.
Summary
This quote suggests that when someone openly expresses their religious beliefs or displays them prominently, it may not necessarily reflect their true depth of faith. It implies that people who try to publicly exhibit their religiousness may actually have a weak or superficial understanding or practice of their chosen religion. In other words, their grand display of religious devotion may be more for show than a genuine reflection of their spiritual values.