Out of these dangerous senses, Bhaktivinoda Ṭhākura says the tongue is the most dangerous. Tongue is the most dangerous. The tongue . . . if we cannot control the tongue, then the tongue will oblige me to take different types of body, one after another. If I am very much fond of satisfying my tongue by flesh and blood, then nature, material nature, will give me facility to taste flesh and blood fresh and give me a body of the tiger. If I do not discriminate of eating, then material nature will give me a body just like a hog, when we have to accept as our food stool.
So we are so-called materially suffering and enjoying according to this body. Therefore this body, this human form of body, is a great opportunity, because God realization begins by engaging the tongue. Sevonmukhe hi jihvādau (Brs. 1.2.234). By engaging the tongue in the loving service of the Lord, one can make advance in Kṛṣṇa consciousness, ultimate realization of God, the tongue. So this tongue in the human body can be engaged. In other body, in the cat's body, dog's body, tiger's body . . . tiger may be a very powerful animal. No animal is powerful or better than human beings. That is accepted.