12 It teaches us to say “No” to ungodliness and worldly passions, and to live self-controlled, upright and godly lives in this present age,

Read Titus 2:12 Using Other Translations

Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world;
training us to renounce ungodliness and worldly passions, and to live self-controlled, upright, and godly lives in the present age,
And we are instructed to turn from godless living and sinful pleasures. We should live in this evil world with wisdom, righteousness, and devotion to God,