A wise person’s good sense protects him, ¹  but a fool’s lack of sense leaves him vulnerable. ² 

If an iron axhead ¹  is blunt and a workman ²  does not sharpen ³  its edge, ⁴  he must exert a great deal of effort; ⁵  so wisdom has the advantage of giving success.

I tried ¹  to understand, examine, and comprehend ²  the role of ³  wisdom in the scheme of things, ⁴  and to understand the stupidity of wickedness ⁵  and the insanity of folly. ⁶