Albert Barnes Commentary Psalms 115:18

"But we will bless Jehovah From this time forth and for evermore. Praise ye Jehovah." — Psalms 115:18 (ASV)

But we will bless the Lord ... - While life lasts; now and ever onward. Our lives are spared, and while those lives are continued, they will be spent in praise.

We will transmit the praise to future times, and when we are dead, the voice of praise will be prolonged by those who come after us.

It may be added here that we now have higher and clearer views of the grave and the future world than the psalmist had, and that though it is certain that our voices of praise must be stilled by death, yet in another world we will continue the work of praise in loftier strains than here, and in a continuance of service that will never end.

The grave is, indeed, before us all; but so also is heaven, if we belong to those who truly fear the Lord and who sincerely worship him through Christ Jesus.