“Do not be deceived: ‘Bad company ruins good morals.’” (1 Corinthians 15:33)
What does it look like to be deceived here? It means to be in denial of how malleable and pliant and vulnerable we are to outside influence.
Knowing we are deeply open to outside influence, we are to strategize what we consume and who we surround ourselves with.
The coming resurrection and final judgment motivates us to be vigilant about this.
This also relates to a good conversation question:
What influences do you most enjoy? Who most shapes you?
Humble people are cognizant and clear about who that is.
The proud pretend they have none or are reluctant to admit who they are.
The naive assume they have or need none.