The Buddha gave us many methods for cultivating the mind. Whether we believe in the Buddha or not, the mind practices are important to all of us. They can also be practiced by anyone.
Undoubtedly, the result of the practice will be different for people with religious belief and those without. However, this is not a problem. We can achieve our goals with these mind practices -- whether we want to attain Buddhahood and benefit all sentient beings, realize self-liberation, or simply alleviate stress, improve the quality of our life, and live a happier and more meaningful life.
What is unfortunate, however, is that everyone seems to be placing emphasis on training the body, not the mind. This preoccupation is leading to an imminent crisis around the world -- not a financial crisis, but a crisis of the mind. Depression, accompanied by symptoms of anxiety and loneliness, has already become the third biggest killer of mankind, following cancer and AIDS, respectively.
~ Depicted from ARE YOU READY FOR HAPPINESS? : The Tibetan Buddhist View on Happiness