The previous observation,  is more general, but he says that what can give an  incentive to this observation, when a person reflects  on G-d's greatness, and on the reward and punishment  on the other end, meaning, he has the proper  outlook as he described above, but he says that the incentive  to achieving true zeal, is by looking at the many  acts of kindness that G-d performs with man at  every moment and the great wonders  that G-d does for him from the time he's born  till the last moment. 