I hate to contradict the profound words of wisdom given to Forest Gump by his revered mother, but life is NOT like a box of chocolates. No. It is more like a game of Poker.
Life deals everybody a different hand. Some are better than others. Too often people focus on the cards in their hand. They lose sight of the reigning principle of Poker.
At the end of the game it isn't always the person with the best hand that walks away with the pot. Frequently it's the best bluffer, the person who convinces others that they have the winning hand.
So believe in your hand. Truly believe in it. And convince others that you believe in it. That is the key to success. That's how you walk away a winner.