“One of the major keys to success is to keep moving forward on the journey, making the best of the detours and interruptions, turning adversity into advantage.”

“Walking” p. 205
The Journey Home (1977)
Context: The longest journey begins with a single step, not with the turn of an ignition key. That’s the best thing about walking, the journey itself. It doesn’t much matter whether you get where you’re going or not. You’ll get there anyway. Every good hike brings you eventually back home. Right where you started.

1990s, Long Walk to Freedom (1995)
Context: I am fundamentally an optimist. Whether that comes from nature or nurture, I cannot say. Part of being optimistic is keeping one's head pointed toward the sun, one's feet moving forward. There were many dark moments when my faith in humanity was sorely tested, but I would not and could not give myself up to despair. That way lays defeat and death.

Book Sometimes you win Sometimes you Learn

29-Jun-2005, Radio Derby
I think he's covered all the angles there.

De la supériorité des mœurs sur les lois (1831) Oeuvres complètes, vol. VIII, p. 286 https://books.google.de/books?id=yrMFAAAAQAAJ&pg=PA286&dq=meilleures.
Original text:
Les meilleures lois ne peuvent faire marcher une constitution en dépit des mœurs ; les mœurs tirent parti des pires lois. C'est là une vérité commune, mais à laquelle mes études me ramènent sans cesse. Elle est placée dans mon esprit comme un point central. Je l'aperçois au bout de toutes mes idées.
1830s
Context: The best laws cannot make a constitution work in spite of morals; morals can turn the worst laws to advantage. That is a commonplace truth, but one to which my studies are always bringing me back. It is the central point in my conception. I see it at the end of all my reflections.

Source: Rocky Balboa

1979