Well, no. One can hope to live a sinless life, but we're not like Jesus in that regard. We're still imperfect people and will stumble, fall, even do things willfully that we know are against what God wants for us - following Christ does not make us perfect, nor does it need to. The whole point of the salvation, redemption, whatever you wish to call it - it that it's our faith in the fact that Jesus paid the penalty that we deserve for our sins that gives us eternal life - and a better life here on earth.
The churchy word for that is 'justification' - it's a one-time thing that covers all of our sins and shortcomings, past and future.
The churchy word for becoming a better and better person - more like Jesus - is 'sanctification.' That's an ongoing process - it doesn't help you earn your salvation (there's nothing any of us can 'do' to get ourselves 'right with God' - to make the good outweigh the bad). What it does do is make us more effective in spreading God's kingdom around here on earth.
“We’re still imperfect people and will stumble, fall, even do things willfully that we know are against what God wants”
So I am trying to square this with what has been said. If “will power” wont keep us sinless, as I agree, but Gods Grace will replace faulty “will power”, then what is falling again in sin a result of? it cant be a lack of will power as it is now out of the equation. So not enough Gods Grace?
Also if the author commits a homosexual act in the future this sin that is going to happen in the future will be forgiven correct?