Psalms 129:2

Many a time ... - This repetition is designed to fix the thoughts on the fact, and to impress it on the mind. The mind dwells on the fact as important in its bearing on the present occasion or emergency. The idea is, that it is no new thing to be thus afflicted. It has often occurred. It is a matter of long and almost constant experience. Our enemies have often attempted to destroy us, but in vain. What we experience now we have often experienced, and when thus tried we have been as often delivered, and have nothing now therefore to fear. We are not to regard it as a strange thing that we are now afflicted; and we are not to be discouraged or disheartened as if our enemies could overcome us, for they have often tried it in vain. He who has protected us heretofore can protect us still. He who defended us before can defend us now, and the past furnishes an assurance that be will defend us if it is best that we should be protected. It does much to support us in affliction if we can recall to mind the consolations which we had in former trials, and can avail ourselves of the result of past experience in supporting us now.

Yet they have not prevailed against me - They have never been able to overcome us. We were safe then in the divine hands; we shall be safe in the same hands now.