Candidates are generally commanded to promise - nay, with a special oath, to swear - that they will never, to any person, at any time or in any way, make known the members, the passes, or the subjects discussed. Thus, with a fraudulent external appearance, and with a style of simulation which is always the same, the Freemasons, like the Manichees of old, strive, as far as possible, to conceal themselves, and to admit no witnesses but their own members. As a convenient manner of concealment, they assume the character of literary men and scholars associated for purposes of learning. They speak of their zeal for a more cultured refinement, and of their love for the poor; and they declare their one wish to be the amelioration of the condition of the masses, and to share with the largest possible number all the benefits of civil life. Were these purposes aimed at in real truth, they are by no means the whole of their object. Moreover, to be enrolled, it is necessary that the candidates promise and undertake to be thenceforward strictly obedient to their leaders and masters with the utmost submission and fidelity, and to be in readiness to do their bidding upon the slightest expression of their will; or, if disobedient, to submit to the direst penalties and death itself. As a fact, if any are judged to have betrayed the doings of the sect or to have resisted commands given, punishment is inflicted on them not infrequently, and with so much audacity and dexterity that the assassin very often escapes the detection and penalty of his crime.
A good tree cannot produce bad fruit, nor a bad tree produce good fruit...the Masonic sect produces fruits that are pernicious and of the bitterest savor.
I, myself, am not a Catholic nor do I know much about Canon Law concerning Freemasonry. I know many Catholic brothers that I know are good men. So here I stand, man standing on the outside of the glass, my only contact with the Catholic world coming from brothers and friends who are of that world and even some of them are Freemasons.
If you want to know more about the Catholic Church's evolving Canon Law on Masonic membership, click here.