Albert Barnes Commentary Ecclesiastes 7:13

"Consider the work of God: for who can make that straight, which he hath made crooked?" — Ecclesiastes 7:13 (ASV)

The work of God - The scheme of Divine Providence, the course of events which God orders and controls . It comprises both events which are “straight,” i.e., in accordance with our expectation, and events which are “crooked,” i.e., which by their seeming inequality baffle our comprehension.