Personally, I think there's a great deal of misunderstanding of what it means to "believe in Jesus."
Fundy christians believe that you must believe in the concept of original sin; believe in the atonement doctrine; you must believe that Christ was sent here to propitiate an angry god, an offended lord; believe that Jesus died for your sins; the entire magilla. And you must verbally demonstrate your belief in these items on a regular basis and that you drag your carcass down to the church each time the door is open. Best if you tithe as well.
And in fact, it seems that the majority of christians feel these are the basic requirements necessary to secure for one's self the benefits and blessings of Christ's life and death here, and so to be saved.
On the other hand, believing in Jesus may also be taken to mean that you: love God with a whole soul; that you love your neighbor as yourself, and that your entire life is obvious proof and sure evidence that you are thus dedicated to these beautiful commandments of love.
By this definition any sentient person on this planet is able to look foward with assurance that they are "saved" and that eternal life will be theirs.
By this definition, and in his practice of life, Gandhi - a Hindu - is one of the greatest christians who ever lived. And so too Lao Tzu. And sincere religionists of whatever philosophy.
Of what benefit is it to claim to be a christian, to claim to “believe” in Christ; to give a tenth of the mint and the cumin, to dance attendance on each and every church program; to go to tent revivals and sing at the top of your lungs, shattering glass at a range of a hundred yards; to be in church Sunday all day long - and then sin like a son-of-a-bitch all week long?
I think believing in Jesus means living your life as he would: loving god (by whatever name) with a whole soul; by loving your neighbor (whatever religion); and by going about doing good in your life.
As for me and my family, we’ll put our money on that last example.