Hello, Here Is A Scenario, Let's Say That You Are

Hello,

Here is a scenario,

Let's say that you are a smoker and that you've been trying to kick the habit for a few years.
Now, let's say that you just diagnosed a patient with lung cancer.
While you are trying to sympathize with said patient, they start to get upset with you, stating that you are a hypocrite for being a smoker and trying to preach to them about health.
How would you respond?