Few Semivowels and Many Mutes

I'm learning from a poet about consonants
some that are semivowels which draw things out
and others--the mutes that make things stop.

Sometimes while chasing a rhyme we like, we either jump or climb or hike,
And miss the sibilant whisper of some softer sisters we might like.
Or use the softer consonants that won't make our readers stop

If we'd just halted the hard-stopping mutes;
Used a few liquids, to draw things out
Making possible a handful of beauts...
Instead they slip'd away and merely flop.

While the sisters use silken whispers
So softly spinning their yarn--
We, of course, chose a thread more coarse
and rode that mighty rhyming horse
into this dusty barn