No. Selfishness is against the teachings of Christ. Christians are supposed to be the opposite of that. Heaven, in my understanding, is not some paradisaical amusement park sort of place. It is the summit of unity with God and all other citizens of Heaven. It is where we encounter the Beatific Vision, seeing God directly and not through a mirror, darkly, as we do now (at best) (1 Corinthians 13:12). To reach such a state, you must first respond to God's love with open arms and then reflect that selfless love unto all others and all of His creation.I am a kind and respectful person, but I only live for my own good feelings. I have no interest in helping others. So, is that a good enough heart that would earn my way into heaven or not?
Why do you care what a religion you don't believe in says, anyway?