“Most symbols have many interpretations.
These do not contradict but amplify each other.
Thus, the square is a symbol of perfection, of honor, and honestly,
of good work.
These are all different, and yet allied.
The square is not a symbol of wrong, or evil, or meanness, or disease.
Ten different men may read ten different meanings into a square
and yet each meaning fits with, and belongs to,
the other meanings . . . all these meanings are right.
When all men know all the meanings,
the need for Freemasonry will have passed away.”
http://www.theeducator.ca/symbolism/rough-perfect/