When the bow meets the violin, a sound of such beauty can emanate that a tear is brought to the eye or bliss can be imagined in its purest form.
If the musician does not understand the instrument the sound will not be deliberate and may produce a horrifying shriek.
It is practice and respect that brings this understanding, knowing when and where to press and move to produce this heavenly sound.
Those that rush or treat the process with contempt will soon fall foul and their ineptitude will be clear for all to see.
That then is like life.
We can sit and concentrate within ourselves but what of other people? Should we not try to help them to make this sound for themselves?