Conditions for the da'i who goes out to call to Islam in the countries of the world

Question:
Who wants to go out to exalt the word of Allah in the countries of the world, how does he do that? And must the conditions for that be met? And what are the conditions? I mean going out on my own and leaving those I am responsible for to Allah (Glorified and Exalted is He) after I have provided for their needs?

Answer:
If he is among the people of knowledge, insight, and balance, known for good, and he knows himself to be strong in calling to Allah, and he has knowledge; then there is no harm in him going out in a way that does not harm his family. He goes out for specific periods and returns to call to Allah (Glorified and Exalted is He) so that he does not neglect his family, so that he attends to them, and so that he fulfills their rights, thereby combining the two benefits.
And if he has brothers with him who help him, and they all go and all return, that is better than going alone, if he has knowledge, insight, and balance, and he has reached an age that makes him one of the steadfast ones, for whom corruption and fitnah (trial, discord or temptation) are not feared in the lands where there is evil.

Question: The common people?

Answer: The common people are not suitable. They do not go to the lands of disbelief. The common people are only in their own lands, where they hear the benefit.

Question: They go to Europe, O Shaykh?

Answer: No, they do not go. No, it is not permissible for them to go. Only the scholars go, the scholars known for knowledge, virtue, and insight. As for the common people, it is not permissible.