A Christian gets to heaven by following the teachings of Christ and the Church. He doesn't do it by another path which may or may not realize the truth. Prayer for a Christian was taught to us by Christ himself and "Christian prayer is ALWAYS determined by the structure of the Christian faith, in which the very truth of God and creature shines forth. For this reason, it is defined, properly speaking, as a personal, intimate and profound DIALOGUE between man and God. It expresses therefore the communion of redeemed creatures with the intimate life of the Persons of the Trinity. This communion, based on Baptism and the Eucharist, source and summit of the life of the Church, implies an attitude of conversion, a flight from "self" to the "You" of God. Thus Christian prayer is at the same time always authentically personal and communitarian. It flees from impersonal techniques or from concentrating on oneself, which can create a kind of rut, imprisoning the person praying in a spiritual privatism which is incapable of a free openness to the transcendental God. Within the Church, in the legitimate search for new methods of meditation it must always be borne in mind that the essential element of authentic Christian prayer is the meeting of two freedoms, the infinite freedom of God with the finite freedom of man." From:
Emphasis mine.