In ancient Israel, God spoke to his people through the prophets, but many did not remain faithful. Then Jesus the Son of God came himself to proclaim salvation for all nations, but still many hardened their hearts and rejected him. More recently, the Mother of our Lord has appeared many times calling us to return to God, but the big division between those who believer and those who don't has remained. I personally belief that God, being most merciful, will show us great signs to draw us to him once more yet at the appropriate time, and this could be the last call to wake us up before the final judgment. But don't take any chances.