My daughter has (at last) discovered the joy of sums. My job now is to compile lists for her to do. Yesterday, hard at work, she called out: Dad, you must make them harder or I'll never get any better! And it made me realise that God loves us according to the difficulty of the problems he sets us, not the comfort and pleasure he bestows. The Chinese say the same: when the master is strict and critical it's because he cares, and when he praises and compliments then he's sick of the sight of you.