Even though I often didn't see my father for months at a time, I know he loved me as much as I love you, Son, and as he once said to me, 'I may not be the best father, but I will always send my prayers when you need them the most,' and that is what I intend to do for you. Remember this, even if you don't see me for a while and want to hate me, I love you.
Magic is like alcohol, the more that is used, the more it causes a hangover later on and the less judgement one has when using it. If one waits a while after casting a spell, things "detoxify." A cantrip or two is like a sip of weak beer, whilst a large creation spell is like a bottle of vodka. Cast something too big and you can die from magic intoxication.