The Quran has mentioned a point at several places. The gist is tazkiya, or purification of the soul. The question is 'purified character' for what? This is to make yourself a deserving candidate for Paradise. This is why the Quran lays a lot of emphasis on tazkiya, or purification (20:76, 87:14 and 91:9). When you discover the truth, your goal becomes reaching God. You seek to enter Paradise.

According to the Quran, one's character should be such that it is deserving of being settled in Paradise. Paradise is the name of a society of high standards. You should be able to find a place in this society. You should be able to live among the people of Paradise. This is the purpose of character building, according to the Quran. Human psychology is such that a person becomes extremely keen about achieving that to which he attaches utmost importance. When you discover God Almighty and Paradise, you become very keen to build such a character that when you enter the society of Paradise, you are able to live there according to its high standards. There are many descriptions of Paradise. For example, a verse says that Paradise will not have any nuisance, self-interest, hate and violence.

This will be the character of people of Paradise. You become so keen that you make every effort to develop those traits which make you a deserving candidate for Paradise.