trimurthi.................

my opinion on the trimuthi's is that each of them depict the various phases of life of a human being

first comes vishnu:-multi faced,energetic,charming...................youthful
[this form explains the way we shall n should behave in our youthful day's]


second form Shiva:-this avatar tells us about our duty to accept responsibility as Shiva took
vish(poison) n stored it in his throat which in turn saved this world
in the same way we should take up our responsibility of looking after
our near n dear ones...............this avatar also tells us about our responsibility
towards our other half(u'r wife/husband)as he's also known as arthanarishwar

then comes Brahma:-the brain,the strategist............
this avatar tells us about our planning for our old age......our various interests in music,knowledge of our surroundings n other worldly things in our old age..n many other things