“Just as the sun covers the darkness with its rays, so charity with its purity covers all the passions of the soul.”
What is charity? In the words of Our Venerable Father among the Saints Isaac the Syrian, charity is sadness incurred by mercy for the suffering. "Even if someone deserves to be treated roughly, still, the merciful one does not return evil for evil. Meanwhile, he showers with plenty those who deserve reward.” This understanding of charity reveals that its essence lies in a co-suffering and compassionate heart towards all of God’s sentient creatures, while its loftiness consists of sacrificing oneself for others.