God entrusts empowered laymen to do His work and to carry out his commission. Back in Jesus' time, those workers were the twelve apostles. Today, we are those workers. That is precisely what we need to do today, to continue steadfastly in prayer, to intercede unceasingly for our holy Christian soldiers whom the Lord has sent out for spiritual battle at the front-lines. We have to pray for God to open the door of evangelism in places where the seed of the true gospel may be sown.
Evangelism is a continuous process.
It entails a total lifestyle of commitment to the sacred cause, not just occasional efforts. It has more to do with being than practicing. The former is an expression of the person on the inside, while the latter is a mere action carried on the outside. Our inner beings need to be first transformed from within by the Holy Spirit from above. Then, we can be empowered to renew our outer lifestyles.