What is the advice for the Muslim youth in this age?

Question:
There is no doubt that reviving the Islamic heritage, as you have mentioned, includes calling to the Book and the Sunnah and conveying them to all people. What do you advise the Muslim youth of this age to do?

Answer:
We advise them first to take care of knowledge and to be well-informed. If they attain this understanding, it is obligatory for them to call others to the religion, for this religion is knowledge, action, calling, and patience, as the Prophet (peace and blessings be upon him) said: : Indeed, man is in loss, except those who have believed and done righteous deeds and advised each other to truth and advised each other to patience [Al-Asr].
The Shaykh Muhammad (may Allah have mercy on him) mentioned in his small book, "The Three Fundamental Principles," that it is obligatory for the Muslim to do these four things: knowledge, action, calling, and patience. The intent is that whoever is qualified for this must learn and act, then he must call others and be patient, as indicated by the verse: Indeed, man is in loss, except those who have believed and done righteous deeds and advised each other to truth and advised each other to patience. Therefore, understanding is necessary: [Yusuf:108]. He calls to what he knows; he knows the prayer and its rulings, so he calls to the prayer and its rulings. He knows zakah, so he calls to zakah and its rulings. If he is well-informed, he calls to fasting, Hajj, jihad, dutifulness to parents, and maintaining family ties. He calls to everything he knows with understanding. He warns against zina, sodomy, and drinking intoxicants, because he knows the rulings of these matters: riba (usury or interest), falsely accusing chaste women, and so on.
He does not speak about anything except with knowledge and understanding, as Allah (Mighty and Majestic) said in His great Book: [Al-A'raf:33]. He placed it at the peak, making it the highest, because the verse describes a progression from the lower to the higher. The greatest of sins is shirk (associating partners with Allah), and then He placed above it here speaking about Allah without knowledge, because shirk is a form of speaking about Allah without knowledge. Many things fall under speaking about Allah without knowledge, so it is obligatory for the servant to beware of that.
And He informed in Surat al-Baqarah that Satan calls to this and commands it. He said, the Exalted: Indeed, he only commands you to evil and obscenity and that you say about Allah what you do not know [Al-Baqarah:168-169]. This is the state of the enemy of Allah; he calls us to obscenity, evil, and speaking about Allah without knowledge. So it is obligatory to beware of that.