Eternal Joy and New Creation

Isaiah 55:12-13

For ye shall go out with joy, and be led forth with peace: the mountains and the hills shall break forth before you into singing; and all the trees of the fields shall clap their hands.

Instead of the thorn shall come up the fir-tree; and instead of the brier shall come up the myrtle-tree: and it shall be to Jehovah for a name, for an everlasting sign that shall not be cut off.