Christians are still sinners.

You cannot perfectly love God every moment of every day.
You cannot always perfectly love everyone as you love yourself.
You cannot always have a pure mind, humility, gentleness, etc.

But although we're still sinners, our Savior isn't! Hallelujah!

To help avoid confusion, the Scriptures teach that we’re sinners (1 Tim. 1:15), but also saints (Eph. 3:18). We’re completely righteous in Christ and sin doesn’t have dominion over us (Rom. 6), but we will still sin (Rom. 7; 1 John 1:10).

Hope this helps, brothers and sisters!

The saying is trustworthy and deserving of full acceptance, that Christ Jesus came into the world to save sinners, of whom I am the foremost.

1 Timothy 1:15