Nothing has to be believed on insufficient evidence...?

Does "Nothing has to be believed on insufficient evidence for people to form bonds of this sort" mean "for people to establish such relationships, it needs sufficient evidence; otherwise, people have enough reasons to not form such bonds"?

Context:


While feeling love for others is surely one of the greatest sources of our own happiness, it entails a very deep concern for the happiness and suffering of those we love. Our own search for happiness, therefore, provides a rationale for self-sacrifice and self-denial. There is no question that there are times when making enormous sacrifices for the good of others is essential for one's own deeper well-being. Nothing has to be believed on insufficient evidence
for people to form bonds of this sort. At various points in the Gospels, Jesus clearly tells us that love can transform human life. We need not believe that he was born of a virgin or will be returning to earth as a superhero to take these teachings to heart.