All we know is that Christ did nothing without a purpose. If the disciples had not been on mission with their Lord, they could have escaped the storm. Responsibility always involves risk. That shocks them-but I tell them that they could probably be a lot happier if they remained single. They could spend their money the way they wanted to, go anywhere they wanted to and do with their time exactly what they wanted to.
Happiness comes as a by-product of a higher purpose for their relationship.
In an intimate relationship, we can discover the joy of developing a self and offering it to help the person we care about. This is equally true about parenting. If you want to be happy, don't have children. It is not easy to take a child's life into your hands and help that child become a mature self. The deeper joy, however, has been to see all of our four children develop into a maturity and purposefulness that makes us glad that we paid the price.