July 26

Among the greatest of all services that can possibly be rendered by man to Almighty God is the education and training of children, young plants of the Abhá Paradise, so that these children, fostered by grace in the way of salvation, growing like pearls of divine bounty in the shell of education, will one day bejewel the crown of abiding glory.

It is, however, very difficult to undertake this service, even harder to succeed in it. 
(‘Abdu’l-Baha, ‘Selections from the Writings of ‘Abdu’l-Baha’)