Adam Clarke on Romans 15:20

So have I strived to preach the Gospel - Οὑτω δε φιλοτιμουμενον· For I have considered it my honor to preach the Gospel where that Gospel was before unknown. This is the proper import of the word φιλοτιμεισθαι; from φιλος, a friend, and τιμη, honor. As I am not ashamed of the Gospel of Christ, so I esteem it an honor to preach it, and especially to proclaim it among the heathen; not building on another man's foundation - not watering what another apostle had planted; but cheerfully exposing myself to all kinds of dangers and hardships, in order to found new Churches.