Salvation means being at once delivered from the power of sin and being, once and for all, washed from the guilt of sin. The very word used here—the
Charles H. Spurgeoncommon salvation—shows that Jude did not regard it as a hidden treasure put away from human reach throughout this mortal life…Salvation has come to our house—we have it; it is a common blessing in the household of faith. As salvation is not a future benefit only, so it is not a benefit reserved for a few of the more saintly people among believers…It is to be confessed that the more holy and godly our life, the brighter our evidence of salvation becomes. But still, the blessing itself is common to all the children of God—and those whose faith is feeble and whose spiritual life is weak are still saved in the Lord. Beloved hearer, you ought not to rest without knowing that you are saved. You may know it, and if it is true, you ought to know it.1
3 Beloved, although I was very eager to write to you about our common salvation, I found it necessary to write appealing to you to contend for the faith that was once for all delivered to the saints.