Quotes
The School of Life: Quotes to Live By: A collection to revive and inspire
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365 Quotes to Live Your Life By: Powerful, Inspiring, & Life-Changing Words of Wisdom to Brighten Up Your Days (Master Your Mind, Revolutionize Your Life Series)
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It would be worth setting up a commonplace book of your own where you can collect phrases or sayings which you read or overhear and which provide inspiration.