An old popular book about about power of belief.
While it is based on Bible and with specific religious foundation,
it could be a useful "philosophy" for life in general.
Audio version recommended.
The Power of Positive Thinking - Wikipedia
1952 self-help book by American minister Norman Vincent Peale. It provides anecdotal "case histories" of positive thinking using a biblical approach, and practical instructions which were designed to help the reader achieve a permanent and optimistic attitude. These techniques usually involved affirmations and visualizations