Contentment is a double edged sword.
When we are content we are ripe for working with the physical, whilst being in the physical but not being of the physical. We are not attracted to those lower frequency attractions of materialism that create a karmic link to the physical, arresting our personal ascension through the frequencies. We can soar above the lower frequencies going ever onwards and upwards towards constant communion with our creator.
However, if we are content with our spiritual progress, we are happy where we are, what we can do and what we can experience in communion with spirit, we will never progress beyond that which is really just localized spirit and will not reach the dizzy heights required to ensure constant communion with our creator.