I said, O my God, take me not away in the midst of my days: thy years are throughout all generations. I said, O my God - This and the following verses seem to be the form of prayer which the captives used previously to their deliverance.
Thy years are throughout all generations - This was a frequent argument used to induce God to hear prayer. We are frail and perishing; thou art everlasting: deliver us, and we will glorify thee.