Likening the gods of the Idolators to the House of a Spider

This is how Allah described the idolators in their reverence of gods besides Him, hoping that they would help them and provide for them, and turning to them in times of difficulties. In this regard, they were like the house of a spider, which is so weak and frail, because by clinging to these gods they were like a person who holds on to a spider's web, who does not gain any benefit from that. If they knew this, they would not take any protectors besides Allah. This is unlike the Muslim believer, whose heart is devoted to Allah, yet he still does righteous deeds and follows the Laws of Allah, for he has grasped the most trustworthy handle that will never break because it is so strong and firm. Then Allah warns those who worship others besides Him and associate others with Him that He knows what they do and the rivals they associate with Him. He will punish them for their attribution, for He is All-Wise and All-Knowing. Then He says:

وَتِلْكَ الاٌّمْثَالُ نَضْرِبُهَا لِلنَّاسِ وَمَا يَعْقِلُهَآ إِلاَّ الْعَـلِمُونَ

وَتِلْكَ الْأَمْثَالُ نَضْرِ‌بُهَا لِلنَّاسِ وَمَا يَعْقِلُهَا إِلَّا الْعَالِمُونَ (And these examples We cite for people, and no one understands them except the knowledgeable ones. - 29:43). After comparing the weakness of the gods of disbelievers with cobweb, it is stressed that Allah Ta’ ala provides such clear examples to elucidate the truth of Oneness. But only knowledgeable persons draw benefit from them, and the people at large do not ponder, so that they could also understand the truth.

Who is knowledgeable in the sight of Allah?