The goal of our life should not be to find joy in marriage, but to bring more love and truth into the world. We marry to assist each other in this task. The most selfish and hateful life of all is that of two beings who unite in order to enjoy life. The highest calling is that of the man who has dedicated his life to serving God and doing good, and who unites with a woman in order to further that purpose.
At the beginning of a marriage ask yourself whether this woman will be interesting to talk to from now until old age. Everything else in marriage is transitory: most of the time is spent in conversation.
I never was attached to that great sect, Whose doctrine is, that each one should select Out of the crowd a mistress or a friend, And all the rest, though fair and wise, commend To cold oblivion, though it is in the code Of modern morals, and the beaten road Which those poor slaves with weary footsteps tread, Who travel to their home among the dead By the broad highway of the world, and so With one chained friend perhaps a jealous foe, The dreariest and the longest journey go.
To speak frankly, I am not in favour of long engagements. They give people the opportunity of finding out each other's character before marriage, which I think is never advisable.