I also am a little reluctant to use the phrase "allow the gospel" or "allow God". Perhaps if you have that same aversion what a dear pastor friend said to me might help. After asking him in what way is it appropriate to use the phrase "allow the gospel" he responded thus:
"I'll try a quick, 2-part answer.
#1. As often happens, part of answer comes down to semantics. Just how exteme are we defining "allow"? Which seques into second part.
#2. Colossians 3:15-16 tell us to "let the peace of Christ rule....let the word of Christ
dwell...." Obviously we cannot stop these things if God chooses to force them on us -nor- can we make them happen if chooses to deny. We let these thing happen in our lives by a). Not doing things which impede or hamper and by b). doing things which promote them.
Illustration.....I plant corn in my garden and 'let' it grow.I let it grow in several ways. I fertilize, weed, and water. I also let it grow by not tromping it down or uprooting it. I don't cause the growth, but I can have a part in letting (allowing) it to grow in healthier, more productive way."
This illustration and statement really helped me. We "let the word of Christ dwell" by not hampering it's growth and by doing things which promote them. Such as the disciplines we talked about Wednesday night.