God shall be our life and the length of our days, and that will be indeed long life, with an addition. But, because length of days may possibly become a burden and a trouble, it is promised, (2.) That it shall prove the way to be easy too, so that even the days of old age shall not be evil days, but days in which thou shalt have pleasure: Peace shall they be continually adding to thee. As grace increases, peace shall increase; and of the increase of Christ's government and peace, in the heart as well as in the world, there shall be no end. Great and growing peace have those that love the law.
- Matthew Henry commenting on Proverbs 3:1-4 (bold added)