"Never to suffer would never to have been blessed." 
-Edgar Allen Poe

"It is always the false that makes you suffer, the false desires and fears, the false values and ideas, the false relationships between people. Abandon the false and you are free of pain; truth makes happy, truth liberates." 

-Nisargadatta Maharaj

"If you have a friend who suffers, you have to help him. 'My dear friend, you are on safe ground. Everything is okay now. Why do you continue to suffer? Don't go back to the past. It's only a ghost; it's unreal.' And whenever we recognize that these are only movies and pictures, not reality, we are free. That is the practice of mindfulness." 

-Thich Nhat Hanh

"People suffer because they are caught in their views. As soon as we release those views, we are free and we don't suffer anymore." 
-Thich Nhat Hanh

"If you suffer and make your loved ones suffer, there is nothing that can justify your desire."
-Thich Nhat Hanh

“Those who don't know how to suffer are the worst off. There are times when the only correct thing we can do is to bear out troubles until a better day.” 
-Deng Ming-Dao