Sentient beings in general, certainly the beings in hell and even the gods, do not have the opportunity to practice on the path of liberation. To establish a foundation for practice on the path of liberation, one must start in the human realm. Gods can also practice if they laid the basis of the practice in their previous life as a human being; thus, establishing this foundation in a previous life as a human is the only condition that governs whether they can continue to practice or not.

~Depicted from THE FOUR SEALS OF DHARMA - All Contaminated Things are Unsatisfactory