The Adornment of the Spiritual Marriage, by Jan van Ruysbroeck, , at sacred-texts.com
Out of the same source wherein meekness takes its rise springs kindliness, for none can be kind save the meek man.
This kindness makes a man show a friendly face, and give a cordial response, and do compassionate deeds, to those who are quarrelsome, when he hopes that they will come to know themselves and mend their ways.
By gentleness and kindness, charity is kept quick and fruitful in man, for a heart full of kindness is like a lamp full of precious oil; for the oil of mercy enlightens the erring sinner with good example, and with words and works of comfort it anoints and heals those whose hearts are wounded or grieved or perplexed. And it is a fire and a light for those who dwell in the virtues, in the fire of charity; and neither jealousy nor envy can perturb it.