EXPEDIENCY

What Is Expediency in the Bible?
Expediency is sometimes defined as the method by which a determined goal is achieved, regardless of the moral consequences. This is not the biblical concept of expediency.

In Bible parlance, a method can be expedient only if it is lawful. In other words, if there is a generic authority for a practice, one may pursue an expedient method for implementing it. 

Here's an example. When Jesus mandated his disciples to evangelize the world (Mt. 28:18-20; Mk. 16:15-16; Lk. 24:46-47), he left it up to them to use the most expedient mode of transportation possible. 

Sometimes a thing may be lawful, but not expedient (cf. 1 Cor. 10:23). For instance, in apostolic times it was technically lawful to eat meat that had been sacrificed to idols, yet, in some cases (where others might be tempted to stumble), it was not expedient (see 1 Cor. 8:1ff; 1 Cor. 10:23ff; Rom. 14).
Adapted from the book "Bible Words and Theological Terms Made Easy" by Wayne Jackson