Kindred,
To believe by definition means to accept as true or the truth of that belief.
If you plan is to enter Heaven by means of believing in Jesus Christ, you need to know and understand the whole of the Lord's Teachings in order to receive the complete Truth.
Failng to believe in the whole Truth and nothing, but the Truth means you will probably fall short of salvation.
Instead of relying solely upon believing, perhaps you should apply what you have learned from the Good Book, do Good and live Life.
Better yet, live it with love, peace and understanding.
