Those who think that they know, --do-- know

 

Those who think that they know, --do-- know

their knowledge affirms, asserts, authenticates, 
ennobles, empowers, endures,

stands, proves, verified , tried, tested, validated 
their silence is loudest, echoes in the universe

stands out, clear, unambiguous, full, comprehensive
so, wins, integrates, updates, becomes richer, valuable, useful

and those who think they do not know, they do not know.

they persist in doubt, uncertainty, hesitation, unclear, 
without anchor, they stay shaky, weak,

It is understood by those who think they understand it., 
since they know, hence can understand

It is not understood by those who think that they do not understand.
since they do not know, hence cannot understand