# Truly I say to you

"I tell you the truth." This phrase adds emphasis to what Jesus says next.

# among those born of women, there has not arisen anyone greater than John the Baptist

"no one born of women has been a greater prophet than John the Baptist" 

# among those born of women

This is a way of referring to people in general. Alternate translation: "out of all people who have ever lived" 

# the least important person in the kingdom of heaven

Here "kingdom of heaven" refers to God's rule as king. Alternate translation: "the least important person under the rule of our God in heaven" 

# is greater than he is

"is more important than John is"