Santosh Patel: You think tiger is your friend, he is an animal, not a playmate.
Pi Patel: Animals have souls... I have seen it in their eyes.

I suppose in the end, the whole of life becomes an act of letting go, but what always hurts the most is not taking a moment to say goodbye.

Throughout the movie, there are shots which feature the profile view of a supine Vishnu (the sleeping Hindu God seen in the barge). He appears in the distant hills when Pi is on holiday and visits the church to drink the holy water. He appears in clouds on a dark night at sea. He is in the shape of the Marinas Trench on the oceanic map. He is also the carnivorous island in profile.