The Lord hath been mindful - He has never yet wholly abandoned us to our enemies.
He will bless the house of Israel - He will bless the people as a nation; he will bless the priesthood and Levites; he will bless all of them who fear him, great and small, in whatsoever station or circumstances found. There is a great deal of emphasis in this verse: several words are redoubled to make the subject the more affecting. I give a literal translation: -
Psalm 115:13; He will bless them that fear Jehovah, the small with the great.
Psalm 115:14; Jehovah will add upon you, upon you and upon all your children.
Psalm 115:15; Blessed are ye of the Lord, the Maker of heaven and earth.
Psalm 115:16; The heavens of heavens are the Lord's: but the earth he hath given to the sons of Adam."
Jehovah is absolute Master of the universe. He has made the heavens of heavens, and also the earth; and this he gives to the children of Adam. When he exiled him from paradise, he turned him out into the earth, and gave it to him and his sons for ever, that they might dress, till, and eat of its produce all their days.
The Lord hath been mindful of us - This would be especially appropriate if the psalm was written, as is commonly supposed, after the return from the captivity of Babylon. In such circumstances it would be every way proper to bring before the mind of the people the fact that God had remembered them and had delivered them.
He will bless us - Our past experience furnishes the fullest evidence that he will continue to bless us. He who has delivered us from so great calamities, and who has restored us to our native land after so long and so painful a captivity, will not forsake us now. There can be now no circumstances in which he cannot bestow on us all the blessings which we need; there will be none when we may not hope that he will bless us. If he could save us from such troubles, be can save us from all; if he did thus interpose, we may argue that he will always grant us his help when we need it.
He will bless the house of Israel; he will bless the house of Aaron - Compare Psalm 115:9-10.