"I spent fifteen years in Dakar with three million Muslims, one hundred thousand Catholics and four hundred thousand animists, and if during those fifteen years we were able to convert ten Muslims, that was the maximum. I mean truly convert them, make them switch from Islam to Catholicism. I'm not saying that there wasn't some Catholic influence thanks to our schools, where we had up to 10-15% Muslims. I didn't want any more than that, otherwise they would have imposed Islam in our schools. Once they are strong, they impose themselves, take the lead and try to convert others. When they are weak, they listen and keep quiet. The young people who went to our schools were certainly influenced, and it is very possible that some of them wanted to be baptised. But it is very difficult for a young man to convert to Catholicism because he is driven out of his family and knows that he even risks being poisoned. [...] Only university students manage to convert because they are independent. They know that their future is secure; they no longer need their families and will leave for Europe, where they can convert. But converting someone who is part of their family is practically impossible. By inspiring the Islamic religion, the devil has truly prevented the conversion of millions of people."
January 1, 1970
https://en.wikiquote.org/wiki/Marcel_Lefebvre