Rather than waiting for some kind of mystical 'call' from God, every believer should respond to the revealed will of God (in Scripture) by giving serious consideration to becoming a cross-cultural missionary.
The command to "make disciples of all nations" was given to the disciples of Christ and remains in effect even until the end of the age (Matt 28:19-20). For the believer, personal involvement in the cause of world missions is not optional. We don't need a call -- we've already been commissioned. Every single Christian is to be making some contribution to the objective of world evangelization and discipleship.
From Gary Friesen, Decision Making & the Will of God, p.330.
