Those by the wayside are they that hear
 The word of God, though only by accident, and very carelessly, and without understanding what they hear: 
 then cometh the devil;
 signified by the fowls of the air: 
 and taketh away the word out of their hearts,
 or memories; that little of it, which is retained there, and diverts their minds from it by other objects; so that they quite forget what they have heard; 
 lest they should believe, and be saved:
 this clause is only in Luke; and with it may be compared ( 2 Corinthians 4:4 ) for with true faith in Christ the sum and substance of the word salvation is connected; and Satan being an enemy to the salvation of souls, does all he can to hinder their faith in him.