The greatest competitor of devotion to Jesus is service to Him. It is never 'Do, do' with the Lord, but 'Be, be' and He will 'do' through you. The only way to keep true to God is by a steady persistent refusal to be interested in Christian work and to be interested alone in Jesus Christ.
Duty, then is the sublimest word in our language. Do your duty in all things. You cannot do more; you should never wish to do less.