The difference between "eternal", "permanent" and "perpectual"
My understanding would be:
1) eternal--related to religion or abstract things.
eternal life;eternal truth;eternal question;eternal love
2) permanent--more concrete things
permanent residence/damage/solution/employee
exceptions are: permanent tension, threat
3) However, eternal or perpectual can be replacements of each other, to describe an annoying action that never stops.
the perpetual/eternal [noise of traffic; argument;complaint] --Is it right?
They can both be used for positive implications, too. Like perpectual/eternal search for truth?
Please tell me whether I understand them right or if I leave out anything or how you will use them.
Thank you very much!