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Entrepreneur Eric Malka had to completely shift his mindset when he sold his company and became an investor. Since then he’s learned many lessons he’s now passing to his kids. When The Art of Shaving — which Malka and his wife Myriam Zaoui founded in 1996 — was bought by Procter & Gamble for a reported $60 million in 2009, Malka realized he needed to educate himself.