1 John 4:2
2 Here's how you test for the genuine Spirit of God. Everyone who confesses openly his faith in Jesus Christ — the Son of God, who came as an actual flesh-and-blood person — comes from God and belongs to God.

Confession means much more than spoken words, it means a lifestyle. Spoken words will gain approval from mankind but a changed lifestyle gains approval from God. So which do you ultimately want? Approval from mankind or God?