Always full of anxieties. Anyone—bird, beast, animal, human being—full of anxieties, because the material world is like that. You have to be full of anxieties. But there is another world, where there is no anxiety. That is called Vaikuṇṭhaloka. Vaikuṇṭha. Vaikuṇṭha means vigata-kuṇṭha; kuṇṭha means anxiety.
So these information we get from the śāstras, from the Vedas. And if we become intelligent enough to understand the śāstras, then our life is successful, human life. Otherwise, if we live like animal, eating, sleeping, mating and defending, without any other knowledge which I am destined to gain in this life, arthadaḥ