John 12:25 -"He who loves his life will lose it and he who hates his life in this world will keep it for eternal life." (NKJV)
This verse is very powerful, if you love your life you will lose it. But me, the logical one, thinks that we are to love our life, that it's a gift from God. But in this verse to love our life is to become self-centered and to love OUR life is not to think of others but to think of OURselves. The one who "loves" his life will lose the loved life and will not have that for eternity.
This verse also says that "he who hates his life in this world will keep it for eternal life". Now, hate is a strong word and I do not know why the Bible uses it in this verse. But in context "hate" means to deny himself or not like himself, but to totally be focused on others. I really don't understand why hate is used in this verse. Please tell me, if you know why. But if we "hate" our life, we will keep it for eternity or eternal life.
So, basically the point is, is that we should "deny ourselves" and love other people, for we will keep it for eternal life. That's what this verse means.