[1] "Corrupt not": It is believed to have been the beginning of some ode or hymn, to the tune of which this psalm was to be sung. St. Augustine and other fathers take it to be an admonition of the spirit of God, not to faint or fail in our hope: but to persevere with constancy in good: because God will not fail in his due time to render to every man according to his works.
[3] "When I shall take a time": In proper times: particularly at the last day, when the earth shall melt away at the presence of the great Judge: the same who originally laid the foundations of it, and as it were established its pillars.