A hardworking person makes good use of time, for time is not only money, it is glory, God's glory! He does as he ought and concentrates on what he is doing, not out of routine nor to while away the passing hours, but as the result of attentive and pondered reflection. This is what makes a man diligent. Our everyday usage of this word 'diligent' already gives us some idea of its Latin origin. 'Diligent' comes from the verb diligo, which means to love, to appreciate, to choose something after careful consideration and attention. The diligent man does not rush into things. He does his work thoughtfully and lovingly.
St. Josemaría Escrivá