40- The stones of the Mizbeach may not cut with metal. The Mizbeach was used to atone for a merit to merit longevity.
41- No steps may be used for the Mizbeach , only a ramp.
Rashi explains that this reminds us to avoid all forms of exposing oneself which can lead to immorality.
These 3 teach us to keep far away from
Now may be a good time for a gem of Torah study.