Converted at the age of fifteen, Joshua began his service for the Lord and Master at the age of sixteen preaching to students and others. From the beginning, he began to see remarkable conversions. During his college years at Madras, India, many students were brought to Christ and after obtaining his postgraduate degree in English language and literature, he came into full-time work for God.

As an editor, writer, radio and television speaker, he was being used of God in several countries. His only ambition was to exalt and glorify the Saviour of all men, the Lord Jesus.