# The seeds that fell among the thorns are people

"The seeds that fell among the thorns represent people"

# they are choked by the cares and riches and pleasures of this life

"the cares and riches and pleasures of this life choke them" 

# the cares

"the things that people worry about"

# pleasures of this life

"things in this life that people enjoy"

# and their fruit does not mature

"and they do not bear ripe fruit" or "and, like a plant that does not produce mature fruit, they do not produce good works"