• We can in part catch others emotions physiologically. If we see someone else in pain, we often express that on our faces.
• People living together tend to influence one another’s feelings. A study found that a non-depressed roommate will show signs of depression after living with a depressed roommate. Even in the workplace, toxic negativity can derail the whole culture and lead to high turnover.

When love surpasses the trouble of a partner, a parent, a child or a friend, we can still sustain our own well-being.

• Work on your own joy. It will give you the happiness reserves you need to help the unhappy person.
• Don’t take it personally. Even if the person lashes out at you, remember it’s not your fault.
• Use the element of surprise. Get the person to engage in spontaneous and enjoyable activities.
• Prevent the spread. If you are the unhappy person, remember that people want to help. Allowing people to help makes them happier.