Do not be bitter. Bitterness kills one's joy of today and render ones dream useless. Rejoice with others when they make headway, do not envy or speak evil of them because of their success, instead, rejoice with them an learn from their experiences.
The more happy you are for the success of others, the easier it becomes for you to fulfill your dreams. Envy makes you neglect your own life dreams, pursuit, and your ambition to succeed becomes a mere imagination because your passion an burning fire has been quenched by bitterness towards someone who care less about your own life.
People of great destiny are prone to be envied by families, friends, colleagues, an whom ever is not on same level with them. Be the one other's envy instead of being bitter about someone else success.
Remember, the bigger your destiny, the more enemies you face.
Great words.