Despite all the material progress in this and the last century we still experience suffering, especially in relation to mental well-being. In fact, if anything, the complex way of life created by modernisation or globalisation is causing new problems and new causes of mental unrest. Under these circumstances I feel that the various religious traditions have an important role to play in helping to maintain peace and the spirit of reconciliation and dialogue, and therefore harmony and close contact between them is essential. Whether we are believers or non-believers and, within the category of the believers, whether we hold this or that belief, we must respect all the traditions. That's very important.
I always tell people in non-Buddhist countries that followers of other religions should maintain their own tradition. To change religion is not easy, and people can get into trouble as a result of confusion. So it is much safer to keep to one's own tradition, while respecting all religions. I'm Buddhist--sometimes I describe myself as a staunch Buddhist--but, at the same time, I respect and admire the works of other traditions' figures such as Jesus Christ. Basically, all the religious traditions have made an immense contribution to humanity and continue to do so, and as such are worthy of our respect and admiration.
When we contemplate the diversity of spiritual traditions on this planet we can understand that each addresses the specific needs of different human beings, because there is so much diversity in human mentality and spiritual inclination. Yet, fundamentally, all spiritual traditions perform the same function, which is to help us tame our mental state, overcome our negativities and perfect our inner potential.
--from Lighting the Way by the Dalai Lama