Happiness makes a successful marriage. If both person are happy with each other they would also integrate love, loyalty, contentment and security to each other. If one person fails to have those then what they are feeling is not a genuine happiness, it's a mere lie life.
What makes a successful marriage are characters of both the couple, being understanding, a sense of maturity and a whole lot of love. Life often have ups and down and so does marriage, problems will arise and as a married couple being able to conquer it together is what makes their relationship works , what makes marriage successful. Facing problems with love and trust for each other and having a mature mind to go with it makes one's relationship last for a lifetime.
you will open your eyes first because you're sleeping