Don't give me Justice: I need Mercy

Wendell Berry has written in Citizenship Papers " Even justice, without mercy ,forgiveness, and love is intolerable." Sleeth, In serve God, Save the Planet has voiced similar statements. Micah 6:08 says,"He has showed you,O man, what is good; and what does the Lord require of you but to do justice, and to love mercy. and to walk humbly with your God." Doubtless there are innumerable other statements like this that I am unaware of. It is a subject worth thought.
Where can I find the need for justice and mercy in my everyday life? When I eat in a restaurant I should give a fair tip to the waiter (waitress). She is working and has to live ,too. Mercy might provide a larger than necessary tip, or an adequate tip even if service was not so good. (She may be just starting or having a bad day.) I should give the benefit of doubt. After all, I will receive recompense based on what I did and thought, not what someone else did or thought.
When I am stopped for speeding and instead of a ticket, receive a warning (could it be my white hair?), that is clearly mercy.
Since I began mulling this topic several days ago, I have become more confused, not less. Virtually all the examples I came up with related to either legal or religious matters. The other examples seemed to fall more in the realm of kindness rather than justice/mercy.
So... what do you think? Give me some input. Posting to comments will allow me to edit and also easily make your thoughts avaiale to everyone who cares to look.