Drink Deep, Or Not At All

The doctrine of predestination appears to to be foolishness to someone who has only studied it a little. Of such a person Boettner gives gives this advice from experience:

...we can most fittingly say of this subject: "A little Predestination is a dangerous thing; Then drink deep, or else touch not the sacred spring." Here, as in some other instances, first draughts confuse and unsettle the mind, but deeper draughts overcome the intoxicating effects and bring us back to our right senses.
(Predestination, p.341)