“Ones ability to adapt or transform in line with the prevailing circumstances is the main path to actual prosperity or failure in life.”

Bill Moyers interview (2002)
Context: I understood really the power of art to transform. I think transformation became the main word in my life.
Transformation because you don't want to just put a mirror in front of people and say, here, look at yourself. What do you see? You want to have a skewed mirror. You want a mirror that says you didn't know you could see the back of your head. You didn't know that you could amount cubistic see almost all the same aspects at the same time. It allows human beings to step out of their lives and to revisit it and maybe find something different about it.

Original: L'abilità di adattarsi si impara affrontando le difficoltà che la vita ci propone giorno per giorno.
Source: prevale.net

In the event, we got both. Thanks @jeremycorbyn.
Series of tweets following Jeremy Corbyn's sacking of shadow ministers who defied a Labour whip not to support an amendment calling for the UK to stay in the single market after Brexit https://twitter.com/DanielJHannan/status/880721871720808448 (30 June 2017)
2010s

https://archive.org/stream/probalbo00ciceuoft#page/n5/mode/2up
Variant translation: Constant practice given to one matter often conquers both genius and art.
Pro Balbo, section 45

What I Believe (1938)
Context: On they go — an invincible army, yet not a victorious one. The aristocrats, the elect, the chosen, the Best People — all the words that describe them are false, and all attempts to organize them fail. Again and again Authority, seeing their value, has tried to net them and to utilize them as the Egyptian Priesthood or the Christian Church or the Chinese Civil Service or the Group Movement, or some other worthy stunt. But they slip through the net and are gone; when the door is shut, they are no longer in the room; their temple, as one of them remarked, is the holiness of the Heart's affections, and their kingdom, though they never possess it, is the wide-open world.
With this type of person knocking about, and constantly crossing one's path if one has eyes to see or hands to feel, the experiment of earthly life cannot be dismissed as a failure. But it may well be hailed as a tragedy, the tragedy being that no device has been found by which these private decencies can be transmitted to public affairs. As soon as people have power they go crooked and sometimes dotty as well, because the possession of power lifts them into a region where normal honesty never pays.

Quoted from his first book https://en.wikipedia.org/wiki/Success_and_Failure_Based_on_Reason_and_Reality, "Success and Failure Based on Reason and Reality" https://www.amazon.co.uk/SUCCESS-FAILURE-BASED-REASON-REALITY/dp/9970983903/ on Amazon, P.21 (July 2018)

Source: The Spellmans Strike Again

Source: Father and Child Reunion (2001), p. 242.