I have heard the statement, characteristic can not change because it will be the specification. It is the nature thing that we get since we was born. But, It is not true. I am sure you ever feel that your characteristic always changes. It will change depend on your activity. When your activity result is satisfied, you will be on good mood, and when your activity result is bad, your mood will be bad too. And I have heard the proverb, "The people characteristic as a chameleon". It means that our characteristic is not static, it always dynamic. As like we know, chameleon always change its skin depend on its environment. The changed of skin chameleon's color because of the emotion changes. know more
Maybe someone said that our characteristic changes because of devil. Devil disturbing the people...