"“We have no doubt that it is in this sense that the word ‘propagate’ has been used in Article 25(1), for what the Article grants is not the right to convert another person to one’s own religion, but to transmit or spread one’s religion by an exposition of its tenets. It has to be remembered that Article 25(1) guarantees “freedom of conscience” to every citizen, and not merely to the followers of one particular religion, and that, in turn, postulates that there is no fundamental right to convert another person to one‘s own religion because if a person purposely undertakes the conversion of another person to his religion, as distinguished from his effort to transmit or spread the tenets of his religion, that would impinge on the “freedom of conscience” guaranteed to all the citizens of the country alike... “We find no justification for the view that if Article 22 grants a fundamental right to convert a person to one’s own religion, it has to be appreciated that the freedom of religion enshrined in the Article is not guaranteed in respect of one religion only, but concerns all religions alike, and it can be properly enjoyed by a person, if he exercises his rights in a manner commensurate with the like freedom of persons following other religions. What is freedom for one is freedom for the other in equal measure, and can therefore be no such thing as a fundamental right to convert any person to one’s own religion.”"
January 1, 1970
https://en.wikiquote.org/wiki/Constitution_of_India