you will understand gradually

Gradually,you will learn that you will easily hurt yourself when you care others too much;
Graduallly, you will learn that there are fewer and fewer people who keep close relationship with you as time flies;
Gradually ,you will learn that one shoud care himself ,due to there are rare people who really care about you, they might be absent when you have accident or need help. So you must care about yourself.
Gradually, you will learn that you might not get respond of the person who you really care about, instead ,the person who you always ignored might be the one who care about you the most .
Gradually, you will learn that there are too many things what you  meet just by chance ,and only can own them one time.
Gradually ,you will learn that sometimes when you fall in love you might not devote the whole heart ,may be the relationship lies in benifit in some degree ,or lies in comparing with otheres.
Gradually, you will learn that it is no use to debate with others   ,nomatter who is right or wrong, due to it will not has a result .
Gradually, you will learn that when you come across something that you not in mood, you should not desire of others showing sympathy to you,most of them will respond you with indifferance. Moreover, it will make them look down of you.
Gradually ,you will learn that there are too many things what not belong to you ,even if you impose  , you can not get them. And God will condemn you for donging that .
Gradually, you will learn that not all things that you have done have meaning, but you can feel that everything you have done will become a kind of memory to you.
Gradually ,you will learn that people's character  exist too many difference.
Gradually, you will learn that many people who you met before will have changed a lot that you even don't recognize, however, please keep the memory.
Gradually ,you will learn that from now on you should hold the  people who you can hold ,and give up people who you can not hold, you'd better not loose many people just in order to hold one person.
Gradually, you will learn that you should respect yousef, because your self-respect  might means nothing in other's heart.

Gradually, you will learn that the realism is cruel.