Problem vs Challenge

Menurut dictionary.com:

problem :

• any question or matter involving doubt, uncertainty, or difficulty;
• a question proposed for solution or discussion;
• a statement requiring a solution, usually by means of a mathematical operation or geometric construction;
• difficult to train or guide;
• unruly;
• dealing with choices of action difficult either for an individual or for society at large.

challenge : 

• a call or summons to engage in any contest, as of skill, strength, etc
• something that by its nature or character serves as a call to battle, contest, special effort, etc
  
• a call to fight, as a battle, a duel, etc
• a demand to explain, justify, etc.
• difficulty in a job or undertaking that is stimulating to one engaged in it. 
• the demand of a sentry for identification or a countersign. 
• a formal objection to the qualifications of a particular juror, to his or her serving, or to the legality of an entire jury.
• the assertion that a vote is invalid or that a voter is not legally qualified.
• the process of inducing or assessing physiological or immunological activity by exposing an organism to a specific substance. 
• the crying of a hound on finding a scent. 
• to summon to a contest of skill, strength, etc. 
• to take exception to;
• to demand as something due or rightful. 
• to halt and demand identification or countersign from. 
• to take formal exception to (a juror or jury). 
• to have a claim to; invite; arouse; stimulate
• to assert that (a vote) is invalid. 
• to assert that (a voter) is not qualified to vote. 
• to expose an organism to a specific substance in order to assess its physiological or immunological activity. 
• to lay claim to. 
• to make or issue a challenge. 
• to cry or give tongue on picking up the scent. 
• donated or given by a private, corporate, or government benefactor on condition that the recipient raise an additional specified amount from the public

Ternyata emang beda ya artinya, mmm, padahal tadinya mau nunjukin, dont see life as a problem, but rather see it as a challenge. Problem makes you whine, but challenge makes you act.