Commentaries:
Barnes' Notes
That he who blesseth himself in the earth - That is, he who shall invoke blessings on himself.
Shall bless himself in the God of truth - Or by the true God. He shall not seek a blessing from a false god; but he shall come before the true God, and seek a blessing at his hand.
And he that sweareth - Every oath that is taken in the land shall be by the true God. There shall be no swearing by idols; but the true God shall be everywhere acknowledged.
Because the former troubles are forgotten - The former punishments and calamities shall be passed away. The favor of God shall be restored. His pure worship shall be re-established, and his name shall be celebrated again in the land. The image here is one of returning prosperity and favor; a state when the happiness will be so great that all the former trials will be regarded as not worthy of recollection.
Other Barnes' Notes entries containing Isaiah 65:16:
Isaiah 48:1
Zephaniah 1:5
DISCLAIMER: Church of the Great God (CGG) provides these resources to aid the individual in studying the Bible. However, it is up to the individual to "prove all things, and hold fast to that which is good" (I Thessalonians 5:21). The content of these resources does not necessarily reflect the views of CGG. They are provided for information purposes only.