If the axe is dull and he does not sharpen its edge, then he must exert more strength. Wisdom has the advantage of giving success.

“But he who kills an ox is like one who slays a man;
He who sacrifices a lamb is like the one who breaks a dog’s neck;
He who offers a grain offering is like one who offers swine’s blood;
He who burns incense is like the one who blesses an idol.
As they have chosen their own ways,
And their soul delights in their abominations,