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I like to repeat what the Holy Spirit tells us through the prophet Isaiah, discite benefacere, learn how to do good. I like to apply this advice to all the different aspects of our interior struggle, because we can never consider our lives as Christians as something finished and complete. The Christian virtues develop as a consequence of real effort, each day.

Take any job in life; how do we set about learning it? First we find out what we want to achieve and what means we have to obtain it. Then we use those means, perseveringly, over and over again, until we have formed a well-rooted habit. As soon as we learn one thing, we discover other things hitherto unknown to us and they in turn stimulate us to continue working without ever giving up.

Charity towards our neighbour is an expression of our love of God. Accordingly, when we strive to grow in this virtue, we cannot fix any limits to our growth. The only possible measure for the love of God is to love without measure; on the one hand, because we will never be able to thank him enough for what he has done for us; and on the other, because this is exactly what God's own love for us, his creatures, is like: it overflows without calculation or limit.

In his Sermon on the Mount, Jesus teaches his divine command of charity to all who are ready to listen with an open mind. At the end, by way of summary, he says, 'Love your enemies, and do good to them, and lend to them, without any hope of return; then your reward will be a rich one, and you will be children of the most High, generous like him towards the thankless and unjust. Be merciful, then, as your Father is merciful.'

Mercy is more than simply being compassionate. Mercy is the overflow of charity, which brings with it also an overflow of justice. Mercy means keeping one's heart totally alive, throbbing in a way that is both human and divine, with a love that is strong, self-sacrificing and generous. Here is what St Paul has to say about charity in his hymn to this virtue, 'Charity is patient, is kind; charity feels no envy; charity is never perverse or proud, never insolent; does not claim its rights, cannot be provoked, does not brood over an injury; takes no pleasure in wrong-doing, but rejoices at the victory of truth; sustains, believes, hopes, endures, to the last.'

This point in another language