The new is threatening to those who have mastered the old.

The new is threatening to those who have mastered the old.

Simon Sinek

Quote authenticity

Score:	Excellent This quote has an official author source You can cite this quote with confidence as true and correct Listed below is the factual evidence of an official source published by either the author, an author's representative or estate

2017 November 09	Origin: Tweet Link: https://twitter.com/simonsinek/status/223506739033669632	Image evidence

British/American author, motivational speaker and marketing consultant

October 9th, 1973