Gospel.com Topics Feed - Optical 2010-08-09T15:55:54-05:00 GCI info@gospel.com /feeds/topics/optical/ Optical illusion helps us understand how to communicate the gospel http://internetevangelismday.com/blog/archives/888 2010-08-09T15:55:54-05:00 We can frequently learn important lessons about life and communication from optical illusions. Here’s one. Which square is darker, A or B?