Narrated Al-Ahnaf bin Qais:

While I was sitting with some people from Quraish, a man with very rough hair, clothes, and appearance came and stood in front of us, greeted us and said, "Inform those who hoard wealth, that a stone will be heated in the Hell-fire and will be put on the nipples of their breasts till it comes out from the bones of their shoulders and then put on the bones of their shoulders till it comes through the nipples of their breasts the stone will be moving and hitting." After saying that, the person retreated and sat by the side of the pillar, I followed him and sat beside him, and I did not know who he was. I said to him, "I think the people disliked what you had said." He said, "These people do not understand anything, although my friend told me." I asked, "Who is your friend?" He said, "The Prophet (peace be upon him) said (to me), 'O Abu Dhar! Do you see the mountain of Uhud?' And on that I (Abu Dhar) started looking towards the sun to judge how much remained of the day as I thought that Allah's Apostle wanted to send me to do something for him and I said, 'Yes!' He said, 'I do not love to have gold equal to the mountain of Uhud unless I spend it all (in Allah's cause) except three Dinars (pounds). These people do not understand and collect worldly wealth. No, by Allah, Neither I ask them for worldly benefits nor am I in need of their religious advice till I meet Allah, The Honorable, The Majestic." '

Classification. Sahih, authentic
Reference: Sahih al-Bukhari, Book of Tax (Zakat) Hadith 489.

It's a familiar case, isn't it? You fall in love with something, search it for years, decades, live in devotion, dedicate your life to that specific knowledge, until you meet someone who is questioning: how do you spend your time? And you share with him/her what you live for. You open before him/her the miracle that was revealed to you. You pass over decades of experience. This bumpkin who, all his life beat his balls, built castles by scamming others, interrupts and gives you a lesson. He enlightens you for being stupid, wasted your life, on the other hand him! He is a genius! Well, the prophet (peace be upon him) did not escape his fate, nor did his predecessors. The world repeats itself, throws the shit on the surface, while the gold sinks to the bottom of the water.

It has been proposed to me to give lectures at universities, to teach about what I have collected. I am not in a mood to serve the cause of Allah in a university context. Or, at least I don't enter all universities. The question arises here, who validates the knowledge or science? A muff? Does a water-headed gang of charlatan people judge science? The same ones who host disciplines that criticize Islam? Those, who have references like the new types of mass-destructive weapons, global climate change, environmental pollution, modern economic tools for impoverishing the population, and communication that makes all of that perfectly acceptable? In such circles, should I explain in an outlying chair what Islam is? Should I subordinate Islam and range it under these? The point is not me, the person but the thing what I represent!

My answer is the above hadith. I stay here on the social network no matter how many likes or shares I get. At least, I'm sending something into the digital space that wouldn't go beyond the 5-person attendance of a "shallow department" of a hanky-panky university.