I found a couple nice quotes that relate to being happy and content. Here’s the first one:

“If you are not spending all of your waking life in discontent, worry, anxiety, depression, despair, or consumed by other negative states; if you are able to enjoy simple things like listening to the sound of the rain or the wind; if you can see the beauty of clouds moving across the sky or be alone at times without feeling lonely or needing the mental stimulus of entertainment; if you find yourself treating a complete stranger with heartfelt kindness without wanting anything from him or her…it means that a space has opened up, no matter how briefly, in the otherwise incessant stream of thinking that is the human mind” - Eckhart Tolle