In Mozart and Salieri we see the contrast between the genius which does what it must and the talent which does what it can.

Memory is the greatest of artists, and effaces from your mind what is unnecessary.

Avoid contradicting in general, especially people you love

There is a vast difference between games and play. Play is played for fun, but games are deadly serious and you do not play them to enjoy yourself.

Talent does what it can, and genius does what it must.

Talent does whatever it wants to do.... Genius does only what it can.