If we can lose our salvation by sinning seriously, then how is that NOT saying we get salvation by avoiding sinning (aka, good works, being good, etc.)? In other words, you ARE saying we have to earn, deserve or merit salvation by what we do, or don't do. The "silly idea" is from the false and accursed gospel of Roman Catholicism.
Round and round... of course faith gets you saved, however, through life that you are living, you are being saved. Look at all those nifty commands Jesus taught. Do you actually think that was just for flavor? Jesus even said that yoke (Oh my, works) are east to bear.
Mathew 7: 22-23 says everyone must check themselves, oh gee, another work to figure out. Again, God has standards, David found that out after being His apple of God’s eye and was on his way of losing salvation unless he did a 180 fast.
Thank you, boatbums. Well said.