So if a man and woman are one in their desire to love Krsna by executing devotional service, then everything else is given in Prabhupada's books. Unfortunately, sometimes one of the parties is not in harmony with the other about the goal of their lives. Then everything is frustrated. So the critical point is, before getting married, to make absolutely certain of the character and intentions of the proposed spouse. This boils down to knowledge and sincerity. Finding a mate with these two qualifications is essential if one is serious about spiritual life. It doesn't matter how many minor personality problems a mate may have, for they can be overlooked and tolerated. As long as one is sincere and knows the goal of life, and how to achieve it, then those unwanted habits, or anarthas, will disappear in due course of time. Patience is essential. We cannot expect to find a mate that is already perfect. Then once finding a sincere and knowledgeable spouse, what spiritual responsibility must they accept?