Why Do the Witnesses Preach?

On tropical islands, in major cities​—world wide—​Jehovah’s witnesses are preaching in 208 lands. Why?

Why do they continue to increase in numbers and zeal, despite bans and persecution in many countries? What is the source of their strength?

Read the 1973 Yearbook of Jehovah’s Witnesses and see. Featured are reports about their work in Brazil, the British Isles, Ghana, Guatemala and Japan. Send only 50 cents.

Please send me the 1973 Yearbook of Jehovah’s Witnesses, for which I enclose 50c.