How can I have confidence that God will someday resurrect me to eternal life?

John 11:25Jesus told her, “I am the resurrection and the life. Anyone who believes in me will live, even after dying.”

1 Corinthians 6:14God will raise us from the dead by his power, just as he raised our Lord from the dead.

1 Corinthians 15:12-14Tell me this—since we preach that Christ rose from the dead, why are some of you saying there will be no resurrection of the dead? For if there is no resurrection of the dead, then Christ has not been raised either. And if Christ has not been raised, then all our preaching is useless, and your faith is useless.