2 Thessalonians 2:15-17

So then, brothers and sisters, stand firm and hold [tightly] to the traditions which you were taught, whether by word of mouth or by letter from us. Now may our Lord Jesus Christ Himself and God our Father, who has loved us and given us everlasting comfort and encouragement and the good [well-founded] hope [of salvation] by His grace, comfort and encourage and strengthen your hearts [keeping them steadfast and on course] in every good work and word.