Meditate upon these things;
give thyself wholly to them,
that thy profiting may appear to all. 1 Timothy 4:15
This is, practically, a promise that, by diligent meditation and the giving up of our whole mind to our work for the Lord we shall make a progress which all can see. Not by hasty reading but by deep meditation we profit by the Word of God. Not by doing a great deal of work in a slovenly manner, but by giving our best thought to what we attempt, we shall get real profit. "In all labor there is profit" but not in fuss and hurry without true heart-energy.
If we divide ourselves between God and mammon, or Christ and self, we shall make no progress. We must give ourselves wholly to holy things, or else we shall be poor traders in heavenly business, and at our stocktaking no profit will be shown.
Am I a minister? Let me be a minister wholly and not spend my energies upon secondary concerns. What have I to do with party politics or vain amusements? Am I a Christian? Let me make my service of Jesus my occupation, my lifework, my one pursuit. We must be in-and-in with Jesus, and then out-and-out for Jesus, or else we shall make neither progress nor profit, and neither the church nor the world will feel the forceful influence which the Lord would have us exercise.
(From Charles Spurgeon's "Faith's Checkbook")