You know how we have been told when we were young that we need to practise and practise over and over again to do well in our examinations? Remember that, how we dread practising it countless times but only to realise in the end that it was worth the pain?
It is not so much the practise that generated the result, but the repetition of solving or reading the same questions and answers that allowed it to happen. Likewise, to most people, a reminder has to be repeated over and over again for it to actually sink in. So let us set aside our egos and listen or read it if we chance upon on it even if we have came across it countless times. Who knows, with a more mature and wiser state of mind, you would perhaps see it in a new light or it could just finally makes sense.