Some people don't know when their sin is sin. Even bible interpretations can be sinful, and devotion can become an obsession or idol. Overcoming these things comes from maturity. Since God meets us where we are at, people accept that and move from there.
Everyone is a work in progress.
I agree that many don’t even realise their sin until God’s law exposes it, that’s why evangelism often starts with the law, so people see their need for Christ.
And yes, we are all a work in progress. But being a ‘work in progress’ doesn’t excuse silence. Look at the woman at the well: she had no theological training, no years of maturity, and she was still living in sin, yet she immediately went and told others about the Messiah.
So, I do find it strange that many who’ve been Christians for years rarely share the Gospel. That doesn’t look like ‘progress’ at all; it looks like neglect. The Spirit doesn’t wait until we’re perfect to use us, He uses those who are willing to obey and open their mouths. That willingness includes turning from sin, responding to His conviction, and trusting Him to work through our weakness.
Yes we should be ready to give an account of our faith.
As to evangelism - in deliberately going out to preach - a fruitful ministry will need the support of others who may not themselves be 'going out'
I have a little experience in this area - we used to always have folks back at base praying in behind.
We also would always break bread together before departing.
Often there would come 'word of knowledge' about the persons we would meet who were ripe for the gospel.
There was nothing scary about it - in fact the peace of Christ is often what attracts the unsaved.
We used to call it Guerrilla evangelism.
Absolutely, supporting those who go out to preach is important, and prayer, fellowship, and intercession are vital parts of evangelism. That said, supporting others doesn’t excuse staying completely silent about the Gospel.
Every believer has the responsibility to share in some way, even if it’s just with those they already know. Not everyone is called to street preaching or full-time missions, but everyone
can speak a word of hope, encouragement, or the good news of Christ to someone in their sphere of influence.
So yes, support is valuable, but it’s not a replacement for personal obedience to Christ’s command to make disciples. Being “in the background” shouldn’t mean never opening your mouth. I feel that some believers may hide behind the guise of 'support' or 'prayer', and some may even hide behind the guise of the pulpit.
"We need to pray for our nation like never before, and then put legs to our prayers and preach the gospel. To pray for the lost and at the same time ignore that command to preach the gospel to every creature, is nothing but empty hypocrisy. It is to honour God with our lips and have cold hearts that are far from Him. May He give us a love that moves us from the pews into the streets, and from our homes into our universities. God save us from the cozy comfort of lukewarm contemporary Christianity." Ray Comfort