The Joy of the redeemed

I love this passage.  The promise given is beautiful.  The best part is that it's real.

"And a highway will be there;
    it will be called the Way of Holiness;
    it will be for those who walk on that Way.
The unclean will not journey on it;
    wicked fools will not go about on it.
9 No lion will be there,
    nor any ravenous beast;
    they will not be found there.
But only the redeemed will walk there,
10     and those the Lord has rescued will return.
They will enter Zion with singing;
    everlasting joy will crown their heads.
Gladness and joy will overtake them,
    and sorrow and sighing will flee away."