Most salespeople are half prepared. They know everything about their company and their product. They know nothing about their prospect.
If you want or need to move, move with a winning record of success, move with a plan, and move to something you love.
Failure is an event, not a person. Think of failure as 'it' and not 'me'.
You don't get great at selling in a day. You get great at selling day by day.
Positive mental attitude is determined by you. Not others.
If you're not convinced, how can you convince others?