Let us take a look at two sets of scripture, Colossians 1:3-14 and Psalms 141, 142, and 143, and look at the message God, via the inspired writers, is giving us concerning the need for spiritual strength.  If we were to summarize this in one statement it would be; we need spiritual strength, not only to grow in understanding of His will, but to follow it despite the influence of the world.