But he knoweth the way that I take: when he hath tried me, I shall come forth as gold.
But - correcting himself for the wish that his cause should be known before God. The omniscient One already knoweth the way that is with 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 23:8-9).
When - let Him only but try my cause, I shall, etc.