Thanks to the Grand Lodge of NC for this helpful information for those men seeking membership in Masonry…
One of the ancient landmarks of the fraternity is that it does not solicit new members. Many good men over the years have had their feelings hurt because close friends whom they knew to be Masons never invited them to join Freemasonry. They did not know, of course, that these close friends were prohibited by Masonic law from issuing such invitations. A man must seek Masonic membership of his own free will and accord.
This circumstance has, as noted, caused some hurt feelings and, in some instances, even hard feelings. It can cause difficulty for Mason and non-Mason alike. It is naturally hard for a man to understand why his father, or his brother, or his very best friend, has never asked him to become a Freemason. On the other hand, a Mason can ache to urge Masonic membership upon someone particularly close to him, someone he knows would be a credit to the fraternity, but he is hemmed in by the Masonic law. So it could be reasonably asked why Freemasonry imposes this prohibition, why it will not permit its members to invite others to join them in Masonic membership.
Read more via Become a Mason | The Grand Lodge of North Carolina.