Buddha-nature is a concept in Mahayana Buddhism that suggests all sentient beings possess an inherent potential for enlightenment. It implies that everyone has the ability to attain the same wisdom and compassion as Buddha, the founder of Buddhism, regardless of their current state or actions. This idea emphasizes the intrinsic purity and goodness within all beings, often described as a seed that can be cultivated through spiritual practice. Recognizing one's Buddha-nature encourages individuals to engage in self-improvement and compassion, fostering a deeper understanding of themselves and their connection to others.