And Frith called after him, 'El-ahrairah, your people cannot rule the world, for I will not have it so. All the world will be your enemy, Prince with a Thousand Enemies, and whenever they catch you, they will kill you. But first they must catch you, digger, listener, runner, prince with the swift warning. Be cunning and full of tricks and your people shall never be destroyed.' (6.8)
In the Blessing of El-ahrairah story, Frith (God) gives El-ahrairah a blessing—strong legs and a cute tail. But notice all the different skills and powers that Frith lists: digging and running are strength-based, but being "cunning and full of tricks" is all about cleverness. And since that type of power (brain-power) is in the same sentence as "your people shall never be destroyed," maybe Frith is saying that that's the most useful type of power.