Little Jacinta lived the words Our Lord gave our community: "Suffer all with me, no longer two but ONE, in My sacrifice of love". Our mission is living the message of Fatima passionately! You can find the full text of the explanation of the 3rd secret at the link above. When it states, "Their life has itself become a Eucharist", that is a "living host" and "living chalice". The "hidden force" is the "purifying and renewing power".
The concluding part of the "secret" uses images which Lucia may have seen in devotional books and which draw their inspiration from long-standing intuitions of faith. It is a consoling vision, which seeks to open a history of blood and tears to the healing power of God. Beneath the arms of the cross angels gather up the blood of the martyrs, and with it they give life to the souls making their way to God. Here, the blood of Christ and the blood of the martyrs are considered as one: the blood of the martyrs runs down from the arms of the cross. The martyrs die in communion with the Passion of Christ, and their death becomes one with his. For the sake of the body of Christ, they complete what is still lacking in his afflictions (cf. Col 1:24). Their life has itself become a Eucharist, part of the mystery of the grain of wheat which in dying yields abundant fruit. The blood of the martyrs is the seed of Christians, said Tertullian. As from Christ's death, from his wounded side, the Church was born, so the death of the witnesses is fruitful for the future life of the Church. Therefore, the vision of the third part of the "secret", so distressing at first, concludes with an image of hope: no suffering is in vain, and it is a suffering Church, a Church of martyrs, which becomes a sign-post for man in his search for God. The loving arms of God welcome not only those who suffer like Lazarus, who found great solace there and mysteriously represents Christ, who wished to become for us the poor Lazarus. There is something more:from the suffering of the witnesses there comes a purifying and renewing power, because their suffering is the actualization of the suffering of Christ himself and a communication in the here and now of its saving effect.