I Samuel 13:20

We are engaged in a great war with the Philistines of evil. Every weapon within our reach must be used. Preaching, teaching, praying, giving, all must be brought into action, and talents which have been thought too mean for service, must now be employed. Coulter, and axe, and mattock, may all be useful in slaying Philistines; rough tools may deal hard blows, and killing need not be elegantly done, so long as it is done effectually. Each moment of time, in season or out of season; each fragment of ability, educated or untutored; each opportunity, favourable or unfavourable, must be used, for our foes are many and our force but slender.

Most of our tools want sharpening; we need quickness of perception, tact, energy, promptness, in a word, complete adaptation for the Lord’s work. Practical common sense is a very scarce thing among the conductors of Christian enterprises. We might learn from our enemies if we would, and so make the Philistines sharpen our weapons.