The Watchtower, January 1st, 2010 page 29, the Watchtower Society says:
“Why God gives us eternal life? Scripture teaches that eternal life is a “free gift” that is, a gift. God offers us, not because they deserve it, but because He loves us very much and because His goodness is infinite. In fact, the Bible says: “All have sinned and fall short […] the glory of God, and as a free gift by his undeserved kindness that is being declared righteous through the release by the ransom paid by Christ Jesus” (Romans 3 verses 23 and 24).
¿But is it true that we will receive the eternal life by doing nothing? ¿Is it really a free gift for everyone, including those who continue sining? ¿To what extent the eternal life is a free gift?