In this podcast: The importance of cultivating your identity to gain an advantage in your field, and why its more important to "rust out" versus "wear out" to cultivate resilience.
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Why Struggle Is Necessary for You To Be Happy | Podcast #215
http://www.ichooseselfdiscipline.com/podcast-215
"A man must exercise his will and improve it by labour so as to make it conformable to nature and free." - Epictetus