1. Some things, you will never know the answer without trying. Some people always live in the shadow of others' failure and even have no courage to try.
2. If you don't try hard, there will be no brilliant success.
3. No matter what the result is, you must try. How do you know if you don't try? Try your best, even if you fail, at least you won't regret it so much.
4. If you fail, you may be disappointed; But if you don't try, you are doomed to fail.
5. Some people result from hard work, others from talent. You don't have such a good talent, you can learn without learning, and you don't have such great luck to guess the answer. Then why are you indifferent? Lucky. Lazy. To name a few. If there is no such thing, it is enough.