Because of, or in spite of?

Fact, Eternal life is a gift, gained by simply believing IN Jesus Christ.  (Jn 6:47 JN 3:16, Eph 2:8-9, 1Tim 1:16, etc.

Question:  Do you receive that gift In spite of what you have or will ever do, or because of things you have done or will do?  

Thought:  If its in spite of what you have or will ever do, but then you can lose it because of something you have done....