What Is It?

Listen from:
First in LANDS but not in SEA,
Next in BOUND but not in FREE.
Third in MOON but not in SUN,
Fourth in WALK not in RUN.
Fifth in ICE but not in SNOW,
Six in PLANT but not in GROW.
In STRENGTH and also MIGHT,
Next not in DARKNESS not in LIGHT
Not in POMP but found in GLORY
Next in TALE but not in STORY,
Next in NOISE but not in THUNDER,
Last in SIGN but not in WONDER.
ML-10/16/1977