Adam Clarke on Matthew 9:19

Jesus arose, and followed him - Our blessed Lord could have acted as well at a distance as present; but he goes to the place, to teach his ministers not to spare either their steps or their pains when the salvation of a soul is in question. Let them not think it sufficient to pray for the sick in their closets; but let them go to their bed-sides, that they may instruct and comfort them. He can have little unction in private, who does not also give himself up to public duties.