James Altucher

Money you lose you can always make back. But even five minutes of time lost is gone forever.

Honesty is the fastest way to prevent a mistake from turning into a failure.

Your competition is not other people but the time you kill, the ill will you create, the knowledge you neglect to learn, the connections you fail to build, the health you sacrifice along the path, your inability to generate ideas, the people around you who don't support and love your efforts, and whatever god you curse for your bad luck.

Smart people want to learn. The rest teach.

Your job, throughout your entire life, is to disappoint as many people as it takes to avoid disappointing yourself.