John Paul II welcomes participants in the World Congress on the pastoral care of migrants and calls for immigrants to be integrated into both the Church and society. He recognises a fundamental right to seek better living conditions abroad, while observing that migration often arises from necessity and brings the emotional and social costs of uprooting. For refugees, a safe and voluntary return home may often be the preferable solution. Migrants’ rights therefore stand together with reciprocal duties for individuals and host nations.