There are any number of sense objects in the world, but you should see to it that your sense organs do not come in contact with too many of these. They are all impermanent things. By becoming captivated with small things your whole life becomes small and impure. You can see this in a number of living beings, which are victims of one or two sense organs. For example when a deer hears some melodious music it becomes fascinated by it and can easily be captured. Therefore, a deer is bound by sound.

A huge elephant can be controlled through the sense of touch and therefore becomes bound by touch. In this way a number of animals can be bound and controlled through different sense organs. Take for example the moth; it sees light and it gets attracted to it, and then it is bound by it and may be destroyed by it. In a similar way, the fish swallows the bait and is caught because it is bound by taste. And the bee enters the flower bound by the power of smell and there it can get trapped for the night when the flower closes its petals: Each one of these beings is bound by one of the sense organs; but man is bound by all five of them and therefore, he is even lower than all these animals. (DBG, p. 114)

Shri Lanka has explained in the Gita that sorrow is the fruit of Rajo guna (quality of passionate activity). He has also shown that only person, who recognises this truth and removes Rajo guna and Tamo guna (quality of sloth and inertia) from his heart, can be happy. As man has all the three gunas (qualities) in his heart, he is bound. (SSS Vol.17, p. 148)