As long as the insult does not include any form of beating , it should be explained to the man that he is crossing his line. Once he hits she should just walk out on him for good.
It means to really understand the situation or to develop "street smarts." Examples: "Jill never suspected her husband of cheating, but she began to wise up after smelling perfume on him and seeing a cup with lipstick stains on it in the car." "It is time to wise up to the fact that the world is not fair and does not revolve around you."
something sports wise!
You would be wise to stay away from this girl and don't take the whole blame because she consented to cheating on her husband. It is better to move forward in your life.
the amount of medicine to give a patient
It would be wise to get a lawyer before your husband manages to hide most of his assets.
They might be poisonous.
That is totally up to you - it is a personal preferance choice.
if it seems the situation is becoming unsafe.
A wise person never puts something in writing in this case as it can come back to haunt them. Although this is your friend you do not know the whole circumstances. It would better to phone her and discuss the situation, but be very sure that her husband is truly cheating and you are not second guessing the situation because this may well end their marriage.
Give your husband an alternative of seeking professional help for his drug problem and if he refuses it would be wise to leave him. If you don't leave him then you are enabling his behavior. Drugs can do strange things to people's minds and he may have cheated on you more than once. If you don't have respect for yourself then no one else will. You deserve better.
The best way is to tell the truth to your husband and sure he will be wise enough to understand you and appreciate that you told him the truth.
The wise old man used a metaphor to explain the situation to the ignorant child.