Loneliness is not to be taken lightly

I have always felt a close relation to this one line from Interstellar:

Dr. Mann: You have attachments. But even without a family, I can promise you that…that yearning to be with other people is powerful. That emotion is at the foundation of what makes us human. It’s not to be taken lightly.

In the context of this quote, it reminds me of how lightly we can take loneliness and its profound effects it can have on us, good and bad alike.