1 – Oliver Wendell Holmes Snr
2 – BrenĂ© Brown – Atlas of the Heart (2021) (page. 97)
3 – C.R. Snyder – Handbook of Hope: Theory, Measures and Applications (2000)
4 – Jane Adams – More College Students Seem to be Majoring in Perfectionism, New York Times (18 Jan 2018)
5 – Liz Fosslien and Molly West Duffy – Big Feelings (2022)
6 – Thomas S. Greenspon – Moving Past Perfect (2012)
7 – Theodore Roosevelt –
8 – Research from Balanced Scorecard Collaborative (2001)
9 – Peter Drucker
10 – Daniel Kahneman – Thinking Fast and Slow (2011)
11 – Victoria Osteen
12 – J.K. Rowling – Harry Potter and the Chamber of Secrets (1998)
13 – Voltaire
14 – Truman Fisher
15 – Peter Wohlleben – The Secret Network of Nature (2017)
16 – C.S. Lewis