Hello and thanks for asking,
- For #66 I wanted to represent the church community that is created by people who search for the meaning of life and trying to know more about God. So my design has 4 people that together they create a cross.
- For #67 is a futuristic design based on your slogan "living with eternity in mind" where mind is a "window" that you are able to see your life, a window to your past and possible future and it's part that create the window are phases of your life that learn, understand and try to find God. The cross that is created by all phases means that you need all this to understand God.
I hope that my English are good and that I gave you the general idea. Let me know if you need anything more.
Regards
Alexander