But a Christianity that makes no visible difference simply cannot show God. It is not true Christianity. Then Peter starts to give some examples of what true Christianity looks like in the hostile world of his day. Peter tells us what it looks like. Christian servants are submissive with all respect to their masters.
Christian servants do good and when they suffer for it they bear the suffering patiently.
In other words Christians are not defiant or rebellious or insolent. The first part of the answer is that this heart and this demeanor are utterly contrary to fallen human nature. By nature we hate to give the impression of weakness. We hate to look like someone got the advantage of us. We hate to let false accusations against us stand.