What I have always taught, over the last forty years, is that a Christian should do all honest human work, be it intellectual or manual, with the greatest perfection possible: with human perfection (professional competence) and with Christian perfection (for love of God’s Will and as a service to mankind). Human work done in this manner, no matter how humble or insignificant it may seem, helps to shape the world in a Christian way. The world’s divine dimension is made more visible and our human labour is thus incorporated into the marvelous work of Creation and Redemption. It is raised to the order of grace. It is sanctified and becomes God’s work, operatio Dei, opus Dei.
We have reminded Christians of the wonderful words of Genesis which tell us that God created man so that he might work, and we have concentrated on the example of Christ, who spent most of His life on earth working as a craftsman in a village. We love human work which He chose as His state in life, which He cultivated and sanctified. We see in work, in men’s noble creative toil not only one of the highest human values, an indispensable means to social progress and to greater justice in the relations between men, but also a sign of God’s Love for His creatures, and of men’s love for each other and for God: we see in work a means of perfection, a way to sanctity. (Conversations, 10)