I'm not an expert on this topic, but one author in particular that I came across as a younger man was James Allen and his writings: https://en.wikipedia.org/wik

I'm not an expert on this topic, but one author in particular that I came across as a younger man was James Allen and his writings: https://en.wikipedia.org/wiki/James_Allen_(author) https://en.wikipedia.org/wiki/James_Allen_(author) And in particular there is a 3-volume series that was available for a few years that put together a lot of the work he had done during his lifetime, even though his most popular seemed to be "As a Man Thinketh". The Wisdom of James Allen I, II, and III: https://www.amazon.com/Wisdom-James-Allen-Including-Prosperity/dp/1889606006 https://www.amazon.com/Wisdom-James-Allen-Including-Prosperi... https://www.amazon.com/Wisdom-James-Allen-Difficulties-Triumphant/dp/1889606073 https://www.amazon.com/Wisdom-James-Allen-Difficulties-Trium... https://www.amazon.com/Wisdom-James-Allen-III-Heavenlylife/dp/1889606081 https://www.amazon.com/Wisdom-James-Allen-III-Heavenlylife/d... It's been a number of years since I last read them, and unfortunately the publisher above went out of business so you can generally only find the titles above used, but I did enjoy the philosophy/thinking shared in the writing, even if their titles may indicate a somewhat religious slant, overall I'd say the writings focus more on leading a good life. This is a good reminder I should read them again to refresh my memory on all that is discussed within the pages however, since it has been probably over 15+ years since I first read them thoroughly.