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 

I decided ¹  to carefully ²  and thoroughly examine ³  all that has been accomplished on earth. ⁴  I concluded: ⁵  God has given people ⁶  a burdensome task ⁷  that keeps them ⁸  occupied. ⁹