But - correcting himself for the wish that his cause should be known before God. The omniscient One already knoweth the way in me (my inward principles: His outward way or course of acts is mentioned in Job 23:11. So in me, Job 4:21); though for some inscrutable cause He as yet hides Himself (Job 23:8, Job 23:9).
when - let Him only but try my cause, I shall, etc.