I must disagree. I think an overemphasis on evangelism (telling people what you believe) instead of apologetics (telling them why you believe it) has been and still is a major reason for the decline of Christianity in the western world. It has resulted in the faith losing a lot of its intellectual credibility, and while that doesnt matter too much for individuals, in the long term it makes it increasingly difficult to “reach” the secular world.
There is something in between the two. The power of attraction. If folks like what they see in you, they may want to investigate the source of your strength. Attending Divine Liturgy leaves no mystery as to what we believe. Actually we can credit Islam and Communism for the didactic nature of The Liturgy.