God is very thorough and methodical.  We see this, for example, in the countryside.  There is a regular round of seasons of the year, each with its own purpose – the spring for growth, the summer for ripening, the autumn for harvest, and then the winter for rest as Nature pauses before the growth and activity of another spring.  Everything works according to a careful plan.

Now God looks after our souls in the same methodical, careful way by means of the Seven Sacraments.  They are so planned as to give us all the grace we need from the cradle to the grave, and indeed even after that.