It is ignorance that is at times incomprehensible to the wise; for instance, he may not see 'the positive person' or 'the negative person' in a black and white way as many people do. A wise man may not understand it because, as a catalyst of wisdom, but not wise in his own eyes, even he can learn from and give back to fools. To think that an individual has absolutely nothing to offer to the table is counter-intuitively what the wise man considers to be 'the ignorance of hopelessness'.