Private integrity is public worship with no audience.

What you do when nobody could possibly find out is the clearest statement you make about what you believe. There is no reward attached and nothing to be gained socially, which is exactly what makes it worship rather than performance. The choice nobody sees is not a smaller version of the public one. It is usually the more honest one.

Look at one place this week where cutting a corner would be completely undetectable. Do it properly anyway, and do not tell anyone you did. That is the whole practice, repeated often enough to become who you are.