I'm the CEO of a cannabis and beverage company. I start my day in Central Park with my dog and hate being surrounded by 'yes' people.

Source: Business Insider

Isa Zapata for BIThis as-told-to essay is based on a conversation with Irwin Simon, the chairman and CEO of Tilray, based in New York City. It's been edited for length and clarity. My career started 40 years ago as a life insurance salesperson.