Hmmm... I'll try using punctuation to 'splain that second verse:

Bear where thou goest; the words of love
Say all that words can say,
Changeless affections strength to prove --
But speed upon the way.

Thought one: Bear (steer) where you are going.
New thought #1: The words of love say all that they can say about changeless affections' strength.
New thought #2 (or somewhat of a reprise of the first thought): Keep on keepin' on.

Now can someone tell me what the "barque shall soon outsail the tide" verse means?

Bob