"Teachers are individuals we hardly forget even when we enter into old age, " said actor Amitabh Bachchan at a recent event.

So, whom does he regard as his best teacher? `I have had quite a few who have had a considerable impact on my life. But I would regard my dad as my greatest guru. His experiences in life taught me a number of things.

Though his physical presence is no longer in my life, his words will always stay with me, ` Big B told CS in a humble manner.

And what can people learn from Big B? `I don't consider myself worthy of being emulated. But if someone wants to imbibe something, it has to be my punctuality!`