because Herod was in awe of John and was protecting him, knowing he was a righteous and holy man. When Herod heard him he would be very disturbed, yet would hear him gladly.
And the seed on the rock are those who, when they hear, welcome the word with joy. Having no root, these believe for a while and depart in a time of testing.
Then even Simon himself believed. And after he was baptized, he went around constantly with Philip and was astounded as he observed the signs and great miracles that were being performed.