In the secular view, this material world is all there is. And so the meaning of life is to have the freedom to choose the life that makes you most happy. However, in that view of things, suffering can have no meaningful part. It is a complete interruption of your life story- it cannot be a meaningful part of the story. In this approach to life, suffering should be avoided at almost any cost, or minimized to the greatest degree possible. This means that when facing unavoidable and irreducible suffering, secular people must smuggle in resources from other views of life, having recourse to ideas of karma, or Buddhism, or Greek Stoicism, or Christianity, even though their beliefs about the nature of the universe do not line up with those resources.