"Sacred" in Classical & Late Renaissance

Personally, I think the architecture in classical period is based mainly on the belief of people. The architecture were built in massive scale to represent the scale of god which could be perceived as "sacred". This idea of "sacred" still appeared in late renaissance period. Although the main idea survived, the content behind this idea seemed to change over time. In late renaissance the idea of "sacred had been combined with "humanity". The invention of logics and theories such as symmetry, balance and geometry had come up and these things were used as references to support the make the sense of sacred to be even stronger. In conclusion, humanity had made the idea of sacred become more reasonable than it was in the past when people seemed to rely mainly on "belief"