In other words, this quote by Ralph Waldo Emerson states that the people who look at the world in an optimistic viewpoint have a positive and openminded character. Others, who are pessimistic, are negative, which reflects back on their character.
"For a seed to achieve its greatest expression, it must come completely undone. The shell cracks, its insides come out and everything changes. To someone who doesn't understand growth, it would look like complete destruction" - Cynthia Occellei