[Buddhism and Christianity] are in one sense parallel and equal; as a mound and a hollow, as a valley and a hill. There is a sense in which that sublime despair is the only alternative to that divine audacity. It is even true that the truly spiritual and intellectual man sees it as sort of dilemma; a very hard and terrible choice. There is little else on earth that can compare with these for completeness. And he who does not climb the mountain of Christ does indeed fall into the abyss of Buddha.
It may be possible to discover which religion is the most profound, but if we ask which religious system is best, it is difficult to respond. The value of a religion is relative to each individual. A religion's philosophical view may be the most profound and comprehensive, but still it can be inappropriate for a particular individual. Buddha did not always teach he most profound perspective. Rather than trying to force the deepest view on everyone, he taught according to individual interest and dispositions. Dalai Lama XIV Becoming Enlightened