Prov 26:1

“Just as snow in summer, etc. This verse warns that the teaching honor should not be conferred on the unlearned. Snow in summer and rain in harvest represent the persecutions of the unbelievers at the time of the preaching of the gospel, which, when they perhaps more heavily pursue, impede the warmth of love in many and spoil the fruits of good work. Glory given to a fool is rightly compared to harvest because if the unlearned is given the chair of teaching, the church is equally harmed by the persecution of the unbelievers, which the disaster of the Arian tempest has proved to be very true.”