Thanks for responding with your thought...SpiritImage
I understand what u r saying. Yet I do believe inertia has a wider meaning then laziness. I decided to find a definition. U see people can b quite active and work all the time... not really lazy but still not moving forward or expanding their horizons.... still sleep walkers... still stagnate... still not awakening... still not discovering and expanding their potential.
Inertia is a nice word for lazy.

a tendency to do nothing or to remain unchanged:
"the bureaucratic inertia of government"
synonyms: inactivity ·
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physics
a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force. See also moment of inertia.