近十幾年來，科學家努力想解釋「快樂」該怎麼定義，如何產生與量化衡量。Daniel Kahneman 似乎在認知心理學的基礎下，提出人有兩種自我的概念：「記憶的自我」(Remembering self)和「經驗的我」(Experiencing self)，並試圖用這兩種視角，解釋我們如何看待快樂。

這樣的二分法，源自他的新書 Thinking, Fast and Slow 所說的，系統一和系統二，可以聽聽看他在 google 的演講。

“Ask yourself what you want for yourself and your life in the next year. What is it that you want to offer the world? Who do you want to be, what do you want more of in your life? And then ask: How might I get there?”

Psychologist Kelly McGonigal explains how to make resolutions that lead to real change: