If you dream of a prophet or leading religious figure of a faith you do not share, do not dismiss the image as false because all religious figures are united by the same universal truths of love, peace and integrity. Prophets and in some cases priests in dreams can also suggest some kind of conflict between your past and your present.
Jesus Christ is a symbol of both the divine and the human; in dreams, he depicts powerful influences acting upon your personality and your life. The image of Christ on the cross is a symbol of life, death and salvation, the perfect man or state to which you can aspire; if you have such a dream it tends to occur at a crisis point in your life or perhaps when something good in you is being crucified. Christ appearing on the cross also suggests redemption through suffering; you do not need to be crucified physically to suffer. Jesus, like the compassionate, meditating Buddha, is also a symbol of peace, humility and service to others.
The figure of the Buddha appearing in your dreams reminds you of the power of suffering and renunciation.
If you dream of being a Buddhist, you need to look at the difference between Western and Eastern spirituality. In fact, any dream in which you convert to or see images related to a religion, be it Judaism, Christianity, Islam or branches or sects of religions such as Scientology, Kabala or the Moonies suggests a need to open your mind to new possibilities and to explore new outlooks and approaches to life.