Does doing something unethical makes a person bad? Does doing something ethical makes a person good? Please explain your response.

No, doing something unethical doesn't necessarily mean someone's just outright a bad person. Everyone makes mistakes, then we learn from them and know how to better ourselves in the future. Doing something ethical doesn't always necessarily mean someone's a good person either. Someone can act like a complete saint to someone, and then go off later and do something unethical to something or someone else.

the eye wink at the hand; yet let that be / which the eye fears, when it is done, to see.

by our hard work

for that