A wise man never knows all, only fools know everything.~African proverb

The clever don't never [in my opinion, a better choice, "don't" is not wrong] praise themselves. They only advance and to reach their goal purposes [http://www.differencebetween.net/miscellaneous/difference-between-purpose-and-goal/]. The stupid will give up and don't move stay stagnant while when the intelligent defeat will overcome all obstacles.

A wise man never knows all, only fools know everything.~African proverb

The clever don't praise themselves. They only advance and reach their purposes. The stupid give up and don't struggle when the intelligent defeat all obstacles.