Quote N°1

«Dance as though no one is watching you,
Love as though you have never been hurt before,
Sing as though no one can hear you,
Live as though heaven is on earth.»

Benedict’s answer to the question whether he has a motto he lives by, during the BAFTA ‘Conversation with Benedict Cumberbatch’ talk (video with relevant clip). He paraphrased but I’ve given the original quote.

The source is not entirely clear but it has been attributed to many, including Mark Twain.